— _________ it going, Jenny? — Not bad,

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问题选择题

— _________ it going, Jenny?

— Not bad, thanks. [ ]

A. What's

B. Where's

C. Why's

D. How's

答案

答案：D

选择题

下列关于做简谐运动的物体的振幅、周期、频率的说法中正确的是( )

A．振幅是矢量,方向是从平衡位置指向最大位移处

B．周期和频率的乘积是一个常数

C．振幅越大,周期必然越大,而频率越小

D．做简谐运动的物体其频率是一定的,与振幅无关

选择题

in the regulations that you should not tell other people the password of your bank account.

A．What is required

B．It is required

C．What requires is

D．It requires