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【单选题】
绝缘电阻表进行开路试验时,当使电阻表转速达额定转速时,其指针应指示( ) 。A.
零
B.
中间
C.
∞
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【单选题】When man began to search the skies, he saw a lot of things. In the universe(宇宙), the earth seemed to be just a small bit of dust. It is only a small planet, and travels around the sun. The sun togethe...
A.
the Milky Way is the only galaxy
B.
other galaxies are near ours
C.
the sun is a large star in the Milky Way
D.
the earth is a small part of the universe
【单选题】Scientists have many theories about how the universe ____ into being. [ ]
A.
came
B.
was coming
C.
had come
D.
would come
【单选题】The time will come ______ man can fly to ______ he likes in the universe.
A.
how…where
B.
when…wherever
C.
where…where
D.
what…which
【单选题】Our whole physical universe, when______to the simplest terms, is made up of two things, energy and matter.
A.
being reduced
B.
reducing
C.
reduced
D.
to be reduced
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