题目内容

质量为1kg的钢球悬挂在劲度系数为100N/m的弹簧下作简谐振动,角频率为(IS)

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作简谐运动的物体,相位确定了,那么振动状态也就确定了。

A. 对
B. 错

1.

A. He'sgotaheadache.
B. Hecan'tsleepatnight.
C. Hecoughsalot.
D. Hedoesn'tfeellikeeating.

2.

A. Havesomefood.
B. Cleanthetable.
C. Makeaphonecall.
D. Buyadictionary.

3.

A. Thesalesmanager.
B. Theinformationofficer.
C. Theofficesecretary.
D. Thechiefengineer.

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