问题 判断题

当光线过亮时,用反光镜的凹面来对光。                                           (   )

答案

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.

单项选择题
写作题

书面表达。

       假设你叫Lucy,昨天收到了朋友Nick的e-mail,得知他马上就要期末考试了,但是每次考试之前他总是紧张,不知道做些什么。请你用英文给他回复一封e-mail,提出你的建议和祝愿,如:考前制定详细的复习计划;有问题及时向老师同学请教;早睡早起, 睡眠充足;健康饮食等等。

       注意:1. 用英语写一篇80词左右的短文。 

                 2. 信的开头和结尾已给出不计入总词数。

Dear Nick,

       Thanks for your letter. You asked me for some advice on how to prepare for an exam. Here is something

for you to follow.                                                                                                                                      

                                                                                                                                                               

                                                                                                                                                               

                                                                                                                                                 Yours, 

                                                                                                                                                  Lucy