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【单选题】
当直流电动机输出机械功率增大时,电动机的电枢电流和所需的电功率也必然随之增大,此时转速 。A.
上升
B.
下降
C.
不变
D.
等于 0
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【单选题】On what point do the conservationists and politicians agree?
A.
Wool exports are vital to the economy.
B.
The fence poses a threat to the environment.
C.
The fence acts as a useful frontier between states.
D.
The number of dogs needs to be reduced.
【单选题】The author states 'politicians assert but do not argue' at the end of Paragraph 3 in order to suggest that politicians ______.
A.
make claims without providing reasons for the claims
B.
take stronger positions on issues than in the past
C.
enjoy explaining the issues to broadcasters
D.
dislike having to explain their own positions on issues to citizens
【单选题】(Relying on) these convenient metaphors, politicians and military commanders do not see, or do not want to see, what these metaphors (hide): the reality of pain and death, the long-term health effects...
A.
Relying on
B.
hide
C.
for the injury
D.
effect on veterans
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