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【单选题】
(0018)某质点作直线运动的运动学方程为 x =3 t - 5 t 3 + 6 ( SI) ,则该质点作A.
匀加速直线运动,加速度沿 x 轴正方向
B.
匀加速直线运动,加速度沿 x 轴负方向
C.
变加速直线运动,加速度沿 x 轴正方向
D.
变加速直线运动,加速度沿 x 轴负方向
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皮皮学刷刷变学霸
举一反三
【单选题】Which is the best title for this passage?
A.
A Writer Wanted a Wife
B.
A Good Idea to Be Rich
C.
A Clever Idea to Make Himself Famous
D.
An Ad. for a Wife
【简答题】简述松下A5伺服驱动器参数设置过程。
【单选题】Which of the following is the BEST example of an internal stimulus that would create need recognition?
A.
a friend comments on how you need a haircut
B.
a radio station runs an ad for a used book sale
C.
a headache
D.
an invitation to a wedding for which you need a gift