题目内容
一物体悬挂在弹簧下方作简谐振动，当这物块的位移等于振幅的一半时，其动能是总能量的_____________。
查看答案
搜索结果不匹配？点我反馈
更多问题
当一平面简谐机械波在弹性媒质中传播时，下述各结论哪个是正确的？
It seems somewhat ________ to expect anyone to drive 3 hours just for a 20-minute meeting.
This area of the park has been specially ________ for children, but accompanying adults are also welcome.
The girl’s face ________ with embarrassment during the interview when she couldn’t answer the tough question.
微信支付 
支付宝支付