下列有关显微镜操作的叙述，错误的
①标本染色较浅，观察时应选用凹面反光镜和调大通光孔
②显微镜的放大倍数是指物像面积的放大倍数
③若转换高倍物镜观察，要先升高镜筒，以免镜头破坏标本
④若在视野中看到细胞质顺时针流动，则实际上细胞质就是顺时针流动的

A：What did you do yesterday?

B：I went to the bookstore and bought a magazine about film.

A：That's cool.

A: Hello, sir, may I talk with you in English?
B: Of course.
A: I have learned English at school for one year. I have very few chances to talk with the English-speaking people.____ 
B: Oh, you speak English very well.
A: Thank you. By the way, ____ 
B: No, I’m not. ____ 
A: How long have you been in this city?
B: ____ 
A: I see. Do you like this city?
B:Yes. I like it very much. It’s a beautiful city.
A: Thank you.____