如图所示的实验操作正确的是( ) A. 点燃酒精灯 B. 液体量取 C. 发布时间:2017-05-16 19:10 │ 来源:www.tikuol.com 题型:选择题 问题: 如图所示的实验操作正确的是( )A.点燃酒精灯B.液体量取C.气密性检测D.取固体药品
题型:选择题 —Did you find the missing couple in the mountain yesterday?—No, but we ______ to get in touch with them ever since.A.had tried B.have triedC.have been tryingD.had been trying 查看答案