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【单选题】
2013年11月23日，中国宣布划设东海防空识别区。对此，国防部申明防空识别区“不针对任何特定国家和目标”，但“对在此区域不配合或不服从命令的航空器，中国武装力量将采取防御性处里措施”。我国此举（） ①行使了主权国家的独立自卫权②说明世界多极化的格局已经形成 ③体现了我国外交政策的基本立场④说明领土是主权国家最重要的构成要素
A.
①②
B.
①③
C.
②④
D.
③④
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参考答案：
举一反三
【简答题】The generator was doused, and the light went out.
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【单选题】A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an _____.
A.
rotor
B.
stator
C.
exciter
D.
armature
查看完整题目与答案
【单选题】A diesel generator has just been paralleled with an AC turbo-generator, but the load can not be properly divided .This could be caused by____________
A.
an incorrect diesel generator governor speed droop adjustment
B.
a faulty reverse power relay within the main circuit breaker assembly
C.
unsynchronized isochronous load distribution adjustments
D.
a different speed setting on each unit
查看完整题目与答案
【判断题】软胶囊的制备方法有滴制法和压制法
A.
正确
B.
错误
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【判断题】软胶囊的制备方法有压制法和滴制法
A.
正确
B.
错误
查看完整题目与答案
【单选题】Loss of or weak residual magnetism in an alternator or generator can be corrected for by ______.
A.
running the rotor in the opposite direction for 5 minutes
B.
allowing the generator to run at 10% of normal speed for 5 minutes
C.
running the generator at normal speed with the field rheostat fully counterclockwise
D.
using a storage battery or battery charger to 'flash' the field
查看完整题目与答案
【单选题】When securing an AC generator, you should FIRST _____.
A.
open the generator circuit breaker
B.
switch the voltage regulator to 'manual'
C.
decrease the field excitation to minimum
D.
reduce the load on the unit
查看完整题目与答案
【单选题】The purpose of DC generator brushes is to （）.
A.
neutralize armature reaction
B.
conduct electric current to an outside circuit
C.
convert DC current to AC current
D.
provide excitation to a DC generator
查看完整题目与答案
【单选题】When the generator overloads in an automatic electric power plant, ______.
A.
the stand-by generator set will start and synchronize automatically
B.
the ACB of generator will trip
C.
the windings of generator will burn out
D.
the whole ship will lose power
查看完整题目与答案
【单选题】Which of the following is true of an asynchronous generator?
A.
The generator uses brushes and slip rings
B.
The rotation and driving frequency are the same
C.
Permanent magnets are used
D.
There is no electrical connection to the rotor
查看完整题目与答案
相关题目：
【简答题】The generator was doused, and the light went out.
查看完整题目与答案
【单选题】A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an _____.
A.
rotor
B.
stator
C.
exciter
D.
armature
查看完整题目与答案
【单选题】A diesel generator has just been paralleled with an AC turbo-generator, but the load can not be properly divided .This could be caused by____________
A.
an incorrect diesel generator governor speed droop adjustment
B.
a faulty reverse power relay within the main circuit breaker assembly
C.
unsynchronized isochronous load distribution adjustments
D.
a different speed setting on each unit
查看完整题目与答案
【判断题】软胶囊的制备方法有滴制法和压制法
A.
正确
B.
错误
查看完整题目与答案
【判断题】软胶囊的制备方法有压制法和滴制法
A.
正确
B.
错误
查看完整题目与答案
【单选题】Loss of or weak residual magnetism in an alternator or generator can be corrected for by ______.
A.
running the rotor in the opposite direction for 5 minutes
B.
allowing the generator to run at 10% of normal speed for 5 minutes
C.
running the generator at normal speed with the field rheostat fully counterclockwise
D.
using a storage battery or battery charger to 'flash' the field
查看完整题目与答案
【单选题】When securing an AC generator, you should FIRST _____.
A.
open the generator circuit breaker
B.
switch the voltage regulator to 'manual'
C.
decrease the field excitation to minimum
D.
reduce the load on the unit
查看完整题目与答案
【单选题】The purpose of DC generator brushes is to （）.
A.
neutralize armature reaction
B.
conduct electric current to an outside circuit
C.
convert DC current to AC current
D.
provide excitation to a DC generator
查看完整题目与答案
【单选题】When the generator overloads in an automatic electric power plant, ______.
A.
the stand-by generator set will start and synchronize automatically
B.
the ACB of generator will trip
C.
the windings of generator will burn out
D.
the whole ship will lose power
查看完整题目与答案
【单选题】Which of the following is true of an asynchronous generator?
A.
The generator uses brushes and slip rings
B.
The rotation and driving frequency are the same
C.
Permanent magnets are used
D.
There is no electrical connection to the rotor
查看完整题目与答案
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