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【简答题】
下面几个质点运动学方程,哪个是匀变速直线运动? x=4t-3 ;( 2 ) x=-4t 3 +3t 2 +6 ;( 3 ) x=-2t 2 +8t+4 ;( 4 ) x=2/t 2 -4/t 。
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举一反三
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mine
B.
yours
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your
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yourself
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A.
songs
B.
plays
C.
comedies
D.
sonnets
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A.
It has been
B.
I have been
C.
There are
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A.
your
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you
C.
yours
D.
you pen
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