问题 单项选择题 A1/A2型题

产生血小板的是 ()

A.红细胞

B.粒细胞

C.巨核细胞

D.多核巨细胞

E.裸核型巨核细胞

答案

参考答案:C

解析:巨核细胞是骨髓中最大的造血细胞,产血小板型巨核细胞的胞质脱落产生血小板。裸核型巨核细胞是没有胞质的巨核细胞,不产生血小板。本题正确答案是C。

阅读理解

阅读理解。

                                                                   

     I always take my vacations at home. But this summer, I want to do something different. I'm going

sightseeing. Next week I am leaving for Hainan. I am staying there for two weeks. Then I'm going to

Tibet. Of course, I'm taking a lot of photos. I can't wait!

                                                                

     I think the best place for a summer vacation is the seaside (海滨). I'm going to Hawaii on August 1st.

It has fantastic beaches and I like the sand, the sea and the sun. I'm staying there for three weeks. There

are lots of exciting things to do there. 

                                                                  

     This summer vacation, I'll be busy. I'm going to Europe to visit my grandparents in Paris and my uncle

in London. I plan to go to New York, because I want to meet my pen pal Tony.

1. Li Hui is going to _____ first for vacation. 

A. Henan

B. Tibet

C. Hainan

D. Tianjin

2. Molly is staying in Hawaii for _____ weeks.

A. two

B. three

C. four

D. five

3. Hector is going to Europe _____.

A. to visit his pen pal

B. to go sightseeing

C. to take photos

D. to visit his relatives (亲戚)

4. Hector's pen pal lives in _____.

A. Hawaii

B. London

C. New York

D. Paris

5. Which of the following is NOT true?

A. Li Hui is not taking his vacation at home this summer.

B. Li Hui is taking lots of pictures during the summer vacation.

C. There are beautiful beaches in Hawaii.

D. Hector's uncle lives in Paris.

判断题