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【单选题】
反接制动是用速度继电器来检测电动机的速度变化,当转速低于( ),其触头恢复原位。A.
100r/min
B.
120r/min
C.
150r/min
D.
180r/min
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举一反三
【单选题】According to the passage, which of the following phenomena did Einstein describe in his General Theory of Relativity, that was not explained by Newton's theory?
A.
A solution to the Michelson-Morley experiment.
B.
The motions of distant planets.
C.
How light could travel in a vacuum.
D.
The nature of gravity.
【单选题】In his composition there are ________errors _______a few misspellings.
A.
no other ... than
B.
some other ... than
C.
more ... than
D.
other ... than
【简答题】In his composition he made few spelling mistakes.
【简答题】He made a few mistakes in g_______( 语法 ) in his composition.
【简答题】After working in the media for a few years, he is hoping to set up his own business to promote his TV ca______.
【单选题】The following phenomena might happen when one sleeps. Which happens last during his non-REM sleep?
A.
Sleepwalking.
B.
Nap.
C.
Doze.
D.
Dream.
【简答题】steal phenomena
【单选题】The boss will try his best to do the work with _____ money and _____ people.
A.
few; little
B.
a few; a little
C.
less; fewer
D.
fewer; less
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