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【单选题】
中枢神经系统的参与下,机体对内外环境的变化所产生的适应性应答,称为
A.
反射
B.
反馈
C.
反应
D.
兴奋
E.
抑制
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【单选题】第十一章 促进与保护投资的国际法制 复习资料.docx
A.
完成
B.
没时间看
C.
不想看
D.
没用
【判断题】The ignition system is designed to convert the 12 volts from the battery into 5,000 to 40,000 volts needed to jump the gap of a spark plug.
A.
正确
B.
错误
【判断题】一切从实际出发是做好各项事情的基本要求、前提和依据。( )
A.
正确
B.
错误
【单选题】If you bein time for the early bus ,be sure to get up before five o’clock in the morning.
A.
are to               
B.
are about to       
C.
are going to      
D.
are due to
【单选题】If a particle with a charge of 2 coulombs moves through a potential difference of 12 volts, its change in kinetic energy will a have magnitude of
A.
6 J
B.
12 J
C.
18 J
D.
24 J
【单选题】If 12 volts are being applied to a resistance of 3 ohms,______________ amperes will flow.
A.
12
B.
3
C.
4
D.
36
【单选题】If a particle with a charge of 2 coulombs moves through a potential difference of 12 volts, its change in kinetic energy will a have magnitude of
A.
12 J.
B.
6 J.
C.
8 J.
D.
24 J.
【单选题】Which of the following statements is true?
A.
At 150 volts, the learner began to complain about the pain.
B.
At 300 volts, the learner complained about his heart condition.
C.
At 180 volts, the learner demanded that the experiment be halted.
D.
The position of 370 volts had been marked 'Danger: Severe Shock.'
【简答题】A.60 volts. B.110 volts. C.220 volts. D.240 volts.
【单选题】How many volts does a power supply’s 4-pin Molex connector carry to internal devices?()
A.
2.5 volts
B.
5 volts
C.
6 volts
D.
15 volts
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