问题 单项选择题 A型题

慢发病毒感染与慢性感染的主要区别在于前者()

A.潜伏期很长

B.必有原发感染

C.不断向体外排出病毒

D.不出现临床症状

E.多为进行性、亚急性,并往往造成死亡

答案

参考答案:E

单项选择题
阅读理解

阅读理解。

     American schools are quite different from those in China. In America, at the beginning of the term,

students must select their courses and teachers first. While in China students usually have no chances to

select their courses and teachers.

     Selecting is very important for your grades in America. So at the first term, don't select too many

courses, 4. or you'll feel very nervous and it may influence your study. Then you have to ask for some

teaching plans. There is some information about subjects, time arranging, marks and textbooks. At the

same time, you must choose the teachers. Different teachers have different teaching methods. If the teacher

is called "killer" by the last grade, many students will give up choosing him. Because this kind of teacher

will leave too much homework, too many exams and give too low grades.

     There is another thing after you select the course and the teacher. How to buy textbooks makes each

student feel hard. The textbooks in America are very expensive. Each copy is about $30-50. In order to

save money, many students buy some used textbooks, and some students usually borrow textbooks from

the school library. You must get enough ready before class. In class, discussing is very important. 5. 老师

鼓励你提出问题或展示你自己的观点。 They don't usually ask you to sit well. Instead they allow you to

sit or stand everywhere you like. They don't give you much homework to do. You can learn some knowledge

and do exercises by yourself. So in American schools, you must do almost all things yourself.

1. At the beginning of the new term, American students have to ask

    for some teaching plans and get their textbooks ready besides __________.

2. The teacher __________ will always leave too much homework,

    too many exams and give too low grades.

3. 根据文章内容回答问题。

   Why do many students in America buy used textbooks?

    ____________________________________________

4. 请将文中黑体字译成汉语。

    ____________________________________________

5. 请将画线句子译成英语。

    ____________________________________________