题型:名词解释 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=s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.0.2m, s B.0.2m,8sC.0.1m, s D.0.1m,8s 查看答案
题型:名词解释 —What are they _____ English?—They're the Statue of Liberty and the White House.[ ]A. in B. toC. for D. on 查看答案