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【多選題】
地球的半徑為R，地面的為g，一顆離地面高度為R有人造地球衛(wèi)星繞地球做勻速圓周運(yùn)動(dòng)，則（ ）
A.
衛(wèi)星加速度的大小為 
B.
衛(wèi)星運(yùn)轉(zhuǎn)的角速度為 
C.
衛(wèi)星運(yùn)轉(zhuǎn)的線速度為 
D.
衛(wèi)星運(yùn)轉(zhuǎn)的周期為 
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舉報(bào)參考答案：
舉一反三
【單選題】What will scientists do to deal with the “imperfectness” problem?
A.
Accept the fact and give up.
B.
Improve and change their methods and techniques.
C.
Try their best to carry out the perfect study.
D.
Ignore it and do as they please.
【單選題】Don’t be afraid of them! They have only 13 people ______ while we have 20.
A.
in particular
B.
at the end
C.
in total
D.
as a result
【單選題】______ everybody is here, let’s begin our meeting.
A.
Since
B.
Unless
C.
Until
D.
For
【單選題】We can learn from the last paragraph that ______.
A.
the universe’s questions are sure to have a final answer
B.
the number of questions is sure to increase with the passing of time
C.
scientists are carrying out improved studies
D.
there will be more scientists in the world in the future
【單選題】After the people went ______, the captain ordered to start the ship.
A.
aboard
B.
above
C.
abroad
D.
backstage
相關(guān)題目：
【單選題】What will scientists do to deal with the “imperfectness” problem?
A.
Accept the fact and give up.
B.
Improve and change their methods and techniques.
C.
Try their best to carry out the perfect study.
D.
Ignore it and do as they please.
【單選題】Don’t be afraid of them! They have only 13 people ______ while we have 20.
A.
in particular
B.
at the end
C.
in total
D.
as a result
【單選題】______ everybody is here, let’s begin our meeting.
A.
Since
B.
Unless
C.
Until
D.
For
【單選題】We can learn from the last paragraph that ______.
A.
the universe’s questions are sure to have a final answer
B.
the number of questions is sure to increase with the passing of time
C.
scientists are carrying out improved studies
D.
there will be more scientists in the world in the future
【單選題】After the people went ______, the captain ordered to start the ship.
A.
aboard
B.
above
C.
abroad
D.
backstage
參考解析：
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