【多选题】如图所示,A、B分别为单摆做简谐振动时摆球的不同位置。其中,位置A为摆球摆动的最高位置,虚线为过悬点的竖直线。以摆球最低位置为重力势能零点,则摆球在摆动过程中( )
【多选题】如图所示, A 、 B 分别为单摆做简谐振动时摆球的不同位置 . 其中,位置 A 为摆球摆动的最高位置,虚线为过悬点的竖直线 . 以摆球最低位置为重力势能零点,则摆球在摆动过程中( )
D.
在位置 B 的机械能大于在位置 A 的机械能
【单选题】指北针圆的直径为( ),指针的尾部宽度宜为( )。
【单选题】Its ___ company is in Shanghai.
【单选题】The company is located in Shanghai.
【简答题】One Chinese company imported a batch of goods from America on CFR Shanghai basis. Payment was made by irrevocable sight L/C. The expotter chartered a ship. After shipment, the exporter presented full ...
【简答题】?You are working for a market research consulting company in Shanghai. You have been asked to write a short report about the beer market share of Sales volume in Shanghai. ?Look at the chart about the...
【简答题】指北针圆的直径宜为()mm,用细实线绘制,指北针尾部的宽度益为()mm,指针头部应注“北”或“N”字。
【单选题】The company is _____ Shanghai.
【单选题】指北针圆的直径宜为( )mm,用细实线绘制;指针尾部的宽度宜为3mm。