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【单选题】
做简谐振动的弹簧振子,下列说法中不正确的是 ( )A.
振子通过平衡位置时，速度最大
B.
振子在最大位移处时，加速度最大
C.
振子连续两次通过同一位置时，位移相同
D.
振子连续两次通过同一位置时，速度相同
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反馈参考答案：
举一反三
【单选题】Which of the following is the length of lectures or seminars or tutorials?
A.
1 hour.
B.
2 hours.
C.
3 hours.
D.
15 hours.
【单选题】Which of the following integers is the closest to the value for the unit length of one leg of a triangle with hypotenuse 13,if the other leg is 7 units long?
A.
8
B.
9
C.
10
D.
11
E.
12
【判断题】Run Time is length of time which is the whole time CNC machine tool running
A.
正确
B.
错误
【判断题】The payback method focuses on the payback period, which is the length of time that it takes for a project to recoup its initial cost out of the cash receipts that it generates.
A.
正确
B.
错误
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