干燥器振荡器皮带脱落对于干燥的影响有（）。A、干燥器不受影响 B、干燥器振动效果不好

女，28岁，停经46天， * * 不规则出血5天。血HCG68μg/ml。

该病例最可能的诊断（）

A．主动脉窦瘤

B．主动脉瓣脱垂

C．主动脉瓣下狭窄

D．主动脉瓣畸形

E．室间隔膜部瘤

阅读理解。

     Mr. Grey is a teacher of English. He is not a very young man, but he is not old, either. He knows three

  or four languages and reads and speaks and writes them well. He reads many books and writes some.

     His desk is in the middle of the room, pens, pencils and ink bottle are on the desk. There is some

 paper, too. The telephone is on the left. There is a reading-lamp behind the telephone. It is almost eleven

  o'clock at night now. But Mr. Grey is still working. He works very late. Sometimes he works till two or

 three o'clock in the morning. But usually he goes to bed at about twelve or one o'clock.

     He teaches his students very well. All of them like him. He is not only their teacher but also their friend.

1. According to the passage, Mr. Grey is an _____ teacher.

    A. old                    

    B. Geography        

    C. English              

    D. Math

2. From the passage we know Mr. Grey's languages are very _____ .

    A. good            

    B. fast          

    C. well          

    D. pretty

3. In the second paragraph, we know Mr. Grey works _____ .

    A. late at night                                  

    B. at noon        

    C. early in the morning                    

    D. for long time in the morning

4. Mr. Grey's _____ is wonderful.

    A. cooking        

    B. music          

    C. fishing          

    D. teaching

5. The passage is mainly about _____ .

    A. Mr. Grey's language                    

    B. the friendly teacher    

    C. Mr. Grey's family                        

    D. a good teacher

可引起红细胞渗透脆性增高的溶血性贫血是（）

A.α海洋性贫血

B.β海洋性贫血

C.镰型细胞贫血

D.阵发性睡眠性血红蛋白尿

E.遗传性球形细胞增多症

下列4组生物细胞通过有丝分裂方式增殖的是（）

A.变形虫、蛙的红细胞

B.乳酸菌、流感病毒

C.衣藻、人的红细胞

D.人的生发层细胞、受精卵细胞

修堤尺寸与设计尺寸之间的误差，不应超过下列数值：堤顶（）误差为±20cm。