【单选题】【消耗次数：1】
The research results show that the earth goes a little faster ____ it is closer to the sun.
①
when
②
so that
③
than
④
as if
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相关题目
【单选题】
While _______ the sun, the satellite has sent more than four billion bits of information back to earth.
①
having orbited
②
being orbited
③
having been orbited
④
orbiting
【单选题】
The earth ____ heat and light from the sun.
①
takes on
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takes in
③
absorbs in
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picks out
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The moon ____ to a large mirror which reflects the sun’s light to the earth.?
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compares ?
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can compare ?
③
can be compared ?
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may compare?
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— Who on earth could it be?— It was ____ other than Peter.
①
none
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nobody
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It seems as if the sun_____round the earth since it rises in the east and sets in the west.
①
circles
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is circling
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has been circling
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were circling
【单选题】
When I get to the top of the building, the sun [填空].
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shine
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【单选题】
It is often more difficult to find trained men than ____ for scientific research.
①
getting financial support
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③
to get financial support
④
in getting financial support
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①
import
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export
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passport
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随机题目
【单选题】
设一个关系模式为R(A,B,C)，对应的关系内容为R={{1,10,50}, {2,10,60}, {3,20,72}, {4,30,60}}，则δB15(R)的运算结果中具有的元组个数为（ ）。
①
1
②
2
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3
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4
【单选题】
设一个关系模式为R(A,B,C)，对应的关系内容为R={{1,10,50}, {2,10,60}, {3,20,72}, {4,30,60}}，则ПB(δC70(R))的运算结果中具有的元组个数为（ ）。
①
4
②
3
③
2
④
1