问题
多选题
一简谐振子沿x轴振动，平衡位置在坐标原点，t=0时刻振子的位移x=-0.1m；t=4/3s时刻x=0.1m；t=4s时刻x=0.1m。该振子的振幅和周期可能为[ ]
A．0.1m，8/3s
B．0.1m，8s
C．0.2m，8/3s
D．0.2m，8s
答案
ACD
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一简谐振子沿x轴振动，平衡位置在坐标原点，t=0时刻振子的位移x=-0.1m；t=4/3s时刻x=0.1m；t=4s时刻x=0.1m。该振子的振幅和周期可能为[ ]
A．0.1m，8/3s
B．0.1m，8s
C．0.2m，8/3s
D．0.2m，8s
ACD
| Choose the best response from A to E. | |
| ( )1.How often do you write to your parents? ( )2.Must we come here tomorrow? ( )3.Could you please do me a favor? ( )4.What should we do to keep our bodies clean? ( )5.Why not to cycling this Sunday?
|