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【单选题】
下列说法正确的是A.
A 、B两点间的电势差，等于将正电荷从A点移到B点时电场力所做的功
B.
电势差只跟电场中两点的位置有关
C.
电势差是一个矢量，有正值或负值之分
D.
A 、B两点的电势差是恒定的，不随零电势面的不同而改变，所以
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举一反三
【单选题】Why does China plan to send more travelers overseas?
A.
Because China wants to increase its influence on world sports.
B.
Because China hopes to increase its influence on world events.
C.
Because China hopes to increase its influence on Asian events.
D.
Because China wants to increase its influence on its neighbors.
【单选题】The human mind can many tasks that other animals cannot, like using language and judging what other people are thinking．
A.
carry out
B.
take out
C.
put out
D.
bring out
【简答题】Both of the teachers and students believe ______________ (毫无疑问地) that he is honest and dit.
【单选题】--People now can know what' s happening in the world quickly. --You're right. With the help of computers, news can ______ every comer of the world.
A.
get
B.
arrive
C.
return
D.
reach
【单选题】What is NOT the advantage of the new robots?
A.
They can perform. different tasks.
B.
They are easy to reprogram.
C.
They increase productivity.
D.
They perform. a single operation at a time.
【单选题】Why does the writer explain the lack of order and justice in ancient China?
A.
To give details about why no one wanted to listen to Confucius.
B.
To describe the situation in China that Confucius hoped to change.
C.
To point out the impact Confucius had in Chinese society.
D.
To teach about the beginning of the Zhou dynasty.
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