问题
判断题
当光线过亮时，用反光镜的凹面来对光。 （ ）
答案
错
题目分析：显微镜视野亮度的调节：光线强时，用小光圈、平面镜调节；光线弱时，用大光圈、凹面镜调节．如果在光线条件较差实验室里使用显微镜，应该使视野变亮，故用大光圈、凹面镜调节．
搜题请搜索小程序“爱下问搜题”
当光线过亮时，用反光镜的凹面来对光。 （ ）
错
题目分析：显微镜视野亮度的调节：光线强时，用小光圈、平面镜调节；光线弱时，用大光圈、凹面镜调节．如果在光线条件较差实验室里使用显微镜，应该使视野变亮，故用大光圈、凹面镜调节．
| 单词填空。 1. The _____ (重要性) of English will last. 2. Do you think your _____ (口语) English has reached Level Five? 3. Everyone who uses English _____ (拥有) English. 4. Fifteen minutes is a _____ (一刻钟) of an hour. 5. As we know, Singapore is famous for its _____ (旅游) in the world. 6. More and more _____ (工业) products have been sold all over the world since China joined WT  O.7. Chinese will be in _____ (代替) of English to be the most popular language in the world. 8. We should practice speaking _____ (日常的) English with our classmates. 9. English is _____ (极其重要的) for international business and Internet because it's used so widely. 10. This is a _____ (近来的) period in history. |