在转动反光镜获得明亮视野时,应先用凹面镜,若视野太暗再换平面镜。[ ] 发布时间:2017-05-14 23:19 │ 来源:www.tikuol.com 题型:判断题 问题: 在转动反光镜获得明亮视野时,应先用凹面镜,若视野太暗再换平面镜。[ ]
题型:判断题 Jane likes to give her students a lot of _______ on how to improve their English. A.suggestion B.adviceC.problemsD.messages 查看答案