题型:选择题 Li Lei can play the guitar ______. [ ]A. very good B. very nice C. very well D. very fantastic 查看答案
题型:选择题 下列关于折射现象中,说法正确的有( )A.光从空气进入水中时,折射角一定大于入射角B.光从空气进入水中时,折射角一定小于入射角C.光从水进入空气中时,传播方向有可能不变D.光从水进入空气中时,传播方向一定改变 查看答案