The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：1. The electric power can be stored.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：2. The power system is made up of 4 parts.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：3. The unification of power system equipment is formed by 4 equipments.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：4. A power system is an undivided integer.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：5. The power network can operate normally without the integration of other 3 equipments.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：6. A link line is called a transmission line.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：7. A link line is formed by 3 power networks.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：8. An electric power network is simply called a power network.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：9. The main network frame is formed by a weak EHV system.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      问题：10. The networks are not closely linked with each other.

      The simultaneousness of the electric power generation means that the electric power generation, transmission, transformation, distribution and utilization must be performed at the same instant. The electric power can't be stored. Therefore, the balance must be kept at anytime during the electric power generation, distribution, and utilization. The electric power system consists of power plants, transmission networks, distribution networks and the consumer's electric utilization equipment.

      The unification of power system equipment means that the generation equipments ,transformation equipments, transmission lines, distribution lines and power utilization equipment of a power system form an undivided integer. Without any of them, the power network can not operate normally. The transmission line connecting two power networks is called link line. Some electric power systems are mutually connected by transmission lines to realize power exchange between these systems. Thus, the inter-connected power system is formed. Electric power network is general name of the transmission network composed of transmission lines and various connected substations. It is simply called the power network.

      The features of a modem power network frame are: (1)The main network frame is formed by a strong EHV (UHV) system; (2) The networks are connected closely to each other; (3)The voltage classes are simplified.

      全文翻译

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pure SF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：1.Contactots, arc-extinguishing elements, insulation material and operating mechanism form the high voltage circuit breaker.

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pure SF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：2. The insulation structure is made up of 3 parts.

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pure SF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：3. The arc-extinguishing medium can be divided into only 3 parts.

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pure SF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：4. An oil circuit breaker means a circuit break with oil as arc-extinguishing and insulation medium. 

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pureSF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：5. A vacuum circuit breaker is not a circuit breaker with close and open contactors in high vacuum.

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pure SF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：6. A pure SF₆ gas is not a good arc-extinguishing medium.

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pureSF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：7. The insulation strength of SF₆ gas is higher than air and vacuum.

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pureSF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：8. An oil minimum circuit breaker is very safe in use.

      The high voltage circuit breaker is mainly composed of contactors, arc-extinguishing elements, insulation material, operating mechanism. The insulation structure of a high voltage circuit breaker mainly includes the insulation of conductive parts.to ground; phase-to-phase and the insulation between breaking contacts. According to the arc-extinguishing mediums, it can be divided into oil circuit breaker (bulk-oil circuit break:er, oil minimum circuit breaker), air blast circuit breaker, SF₆ circuit breaker, vacuum circuit breaker etc. The circuit breaker with oil as arc-extinguishing and insulation medium are called oil circuit breaker. The circuit breaker whose contactors close and open in high vacuum is called vacuum circuit breaker.

      SF₆ circuit breaker is the circuit breaker in which gasSF₆ is used as the arc-extinguishing and insulation medium. The pureSF₆ gas is a good arc-extinguishing medium. Its insulation strength is higher than air and vacuum, and it has good heat dissipation capability. Besides, there isn't any danger of burning or explosion. Now, the mostly used circuit breakers in the power grid are oil minimum circuit breaker, vacuum circuit breaker and SF₆ circuit breaker.

      问题：9. An oil minimum circuit breaker has bad heat dissipation capability.