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问题 选择题
盒中有10个铁钉，其中8个是合格的，2个是不合格的，从中任取一个恰为合格铁钉的概率是（　　）
A．
1
5
B．
1
4
C．
4
5
D．
1
10
答案

从盒中的10个铁钉中任取一个铁钉包含的基本事件总数为10，

其中抽到合格铁钉（记为事件A）包含8个基本事件，

所以所求的概率为P（A）=

8
10
=
4
5
．

故选C．

阅读理解

  Frank is my good friend. We are in the same class. He is fourteen, one year older than me. His parents are both teachers in No 7 Middle School. Frank studies hard. His English and math are very good. He often helps other students with their English and math. Our teachers like him very much.

We go to school together by bike in the morning. We have lunch at school. After school in the afternoon, we often play sports. We play soccer and baseball. In the evening, he does his homework at home. Sometimes he watches soccer games on TV. On Sundays, he goes out with his parents in his father’s car. They play in the park and do sports there. Sometimes my father takes me there, too. We play sports together. We have a good time.

小题1:Who is Frank? He is a _________.

A．teacher

B．soccer player

C．student

D．driver小题2:I’m ________ years old this year.

A．fourteen

B．thirteen

C．fifteen

D．sixteen小题3:Frank is good at __________.

A．math and Chinese

B．English and Chinese

C．math and English

D．music and Chinese小题4:Frank __________ at school.

A．has breakfast

B．has supper

C．has lunch

D．watches TV小题5:When does Frank do his homework?

A．In the evening

B．In the morning

C．In the afternoon

D．At noon.
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单项选择题 A1/A2型题

关于高血压性心脏病的病理改变描述，错误的是（）

A.左心室后负荷增加

B.升主动脉扩张

C.主动脉退行性变

D.左心室心肌肥厚

E.左心功能不全
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