问题 单项选择题

关于皮肤的免疫功能,下列错误的是()。

A.皮肤内的淋巴细胞主要是CD4T细胞和CD8T细胞,二者之比约为0.98。

B.Langerhans细胞是表皮中重要的抗原呈递细胞。

C.表皮内的淋巴细胞占皮肤淋巴细胞总数的2%,以CD4T细胞为主。

D.角质形成细胞具有合成和分泌白介素、干扰素等细胞因子的作用。

E.皮肤表面存在分泌型IgA,可通过阻碍黏附、溶解、调理吞噬、中和等方式参与抗感染和抗过敏。

答案

参考答案:C

阅读理解

Do you want to do well in exams? Sometimes your knowledge is not enough, you also need good strategies. Here are some for you. 

Before you answer the questions, if you feel a little nervous, take a few deep breaths to help you relax.

Always read the question carefully and make sure that you understand it. Read it a few times if possible.

Find out how much each question is worth or how many points you need. If it asks to give one answer, only write one.

If there is a difficult question, don’t worry. Go on to the next question and come back to it if you have time later.

Try not to 1eave questions unanswered when you finish the text. Sometimes a guess may get you points.

When you finish, go back and check your answers. You will need to check your writing for spelling mistakes.

小题1:From the passage, we know we can            to help ourselves relax if we feel a little nervous.

A.tell ourselves not to be nervous

B.ask the teacher for help

C.go out for a walk

D.take a few deep breaths小题2:To make sure we understand the questions, we had better             .

A.read it fast

B.read it till we finish it

C.read it a few times if possible

D.read it slowly小题3:When we finish answering all the questions, we need to      

A.hand in at once

B.check spelling mistakes

C.worry about our points

D.check with classmates小题4:The underlined word "strategies" in the passage means       

A.策略

B.思维

C.途径

D.智慧小题5:Which of the following is NOT RIGHT according to the passage?

A.Find out how many points we need or how much each question worths.

B.Try not to leave questions unanswered when we finish the text.

C.If it asks to give one answer, we'd better write more.

D.Sometimes we should guess the answers to get points.

填空题