某种动物的翅膀在2s内做了700次振动,它的频率是______Hz,正常的人__ 发布时间:2017-04-29 17:12 │ 来源:www.tikuol.com 题型:填空题 问题: 某种动物的翅膀在2s内做了700次振动,它的频率是______Hz,正常的人______听到它的声音.
题型:填空题 How did it _____ that you failed to _____ in time yesterday?[ ]A. come up; turn downB. come on; turn overC. come over; turn offD. come about; turn up 查看答案