He didn't go there yesterday, he? [ ] A 发布时间:2017-06-30 11:43 │ 来源:www.tikuol.com 题型:选择题 问题: He didn't go there yesterday, he? [ ]A. did B. does C. didn‘t D. doesn't
题型:选择题 以下实验现象或事例中,能说明声音产生原因的是( )A.正在响铃的闹钟放入密封的玻璃罩内,逐渐抽出空气,声音会逐渐减小B.吹笛子时,手指按住不同的孔便会发出不同的声音C.人们先看到闪电,隔一段时间才听到远处的雷声D.将发声的音叉接触水面,能溅起水花 查看答案