题目内容
不管以什么样方向进行切片,两支圆柱状的铅笔都不能切出一个实心圆形。
查看答案
搜索结果不匹配？点我反馈
更多问题
低倍镜转换高倍镜观察时,要先把待观察结构移到视野中央位置,然后再转换到高倍镜,调焦至清晰观察。
keep up withset upfire offtake the leadadd tostand outin large partvisit withaccount forat a disadvantage2. People browse the Internet, read newspapers and watch TV to _____________ what is happening in the world.3. The university has __________ another large laboratory for students to design more complicated robots.4. I find it very difficult to ___________ the fact that two of our best students failed the exam.5. In the current economy, with unemployment high and competition for jobs fierce, your seume needs to ______________ for all the right reasons.6. She is getting popular since she appeared in a TV interview last month. Her new movie will no doubt __________ her growing fame.7. The developed countries should ______________ in reducing greenhouse gas emissions (排放) and provide support for the developing nations to follow.8. If your spoken English is not very good, then you may be _______________ when you are looking for a job.9. Their success was due ___________ to their well-conceived plan.10. He has been so occupied with his work these days that he barely has time to ____________ his friends.
用油镜观察时,物镜与盖玻片之间要有香柏油填充,使用完毕后要用二甲苯将镜头和玻片上的香柏油擦拭干净。
倒置显微镜物镜在载物台的上方,可以用于活细胞观察。
微信支付 
支付宝支付