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英语
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It has already been visited b___ man from the Earth.Man-made satellites have been sent up i_ space
by many countries.
人气：183 ℃ 时间：2020-04-16 08:07:49
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Man-made satellites have been sent up into speca by many countries.(改为主动句）
So far many man-made satellites_____into space. A.have been set up B.are being set up
Man has already been to the------
People say that there are maby man-made satellites around the earth.改为被动语态
Many countries have sent up man made satellites into space _____(includ)China
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4个连续奇数的连乘积是326025，它们的和是_．
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