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问题 单项选择题

原发性血小板增多症的血液特点是（）

A.血小板多在300×109～1000×109／L

B.血小板聚集成堆，可见巨型血小板

C.血小板对胶原、花生四烯酸诱导的聚集反应增强

D.对肾上腺素反应敏感

E.白细胞一般不增多

答案

参考答案：B

补全对话，情景问答

Look and complete.

A: 1.                                  _ on your holiday?

B: I went to Harbin.

A: 2.                                         ?

B: I went on January l st.

A: 3.                                         did you go to Harbin?

B: I 4.                                           train.

A: 5.                                        _ you do?

B: I went 6.                                          .

A: Did you eat good food on your holiday?

B: Yes, I did.
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单项选择题

干沉降多层滤膜法的采样是由（）个安有滤膜的滤膜夹组成。

A.2

B.3

C.4
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