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搜题
【单选题】
接触器主触点是
A.
触点
B.
常闭触点
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皮皮学刷刷变学霸
举一反三
【判断题】国有土地使用权可以作为商品出让和转让,也可以用于抵押。( )
A.
正确
B.
错误
【简答题】英翻汉“An electric current varies directly as the electromotive force and inversely as the resistance. ”
【判断题】国有土地使用权可以作为商品出让和转让,也可以用于抵押。( )
A.
正确
B.
错误
【判断题】The term voltage is commonly used to indicate a difference in potential but electromotive force is not.
A.
正确
B.
错误
【判断题】Electromotive force (EMF) is measured in volts .
A.
正确
B.
错误
【简答题】electromotive force
【判断题】在不能利用自然导体的情况下,保护零线导电能力最好不低于相线的二分之一.
A.
正确
B.
错误
【简答题】( ): Electromotive force or potential difference, usually expressed in volts.
【单选题】Which of the following can NOT be regarded as an external electromotive force (emf)?
A.
a chemical battary
B.
a protable battary
C.
a voltage source
D.
a resistor
【单选题】The electromotive force or EMF is measured __________ Volts.
A.
in
B.
on
C.
at