一平面简谐横波的波动表达式为y=0.05Cos(20πt+47πχ)(SI)。取k=0,±l,±2,…,则t=0.5s时 一平面简谐横波的波动表达式为y=0.05Cos(20πt+47πχ)(SI)。取k=0,±l,±2,…,则t=0.5s时各波峰所在处的位置为( )。 分类:公共基础 题型:单选题 查看答案
What's the main reason the man doesn't like watching plays? What's the main reason the man doesn't like watching plays?A.Because they areexp 分类:公共基础 题型:单选题 查看答案
I didn' t feel like __________ , so he suggested __________a I didn' t feel like __________ , so he suggested __________a taxi,A.to walk; tak 分类:公共基础 题型:单选题 查看答案