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问题 多项选择题

对比剂的药理作用包括

A．化学反应

B．物理反应

C．过敏反应

D．物理毒性

E．化学毒性

答案

参考答案：C,D,E

解析： 对比剂的药理作用包括化学毒性、物理毒性及过敏反应。

阅读理解

阅读理解。

     My uncle has a great sports collection. He loves sports very much. And he loves all balls. He likes

playing basketball and volleyball. He also likes watching ballgames. How many balls does he have? He has

5 basketballs, 12 baseballs, 10 tennis rackets, 4 volleyballs and 14 baseball bats and many other balls.

1. _______  has a great sports collection.

A. My father

B. My grandfather

C. My uncle

D. My cousin

2. He loves _______  very much.

A. sports

B. music

C. balls

D. A and C

3. He likes playing _______  and _______.

A. volleyball; baseball

B. volleyball; basketball

C. basketball; baseball

D. soccer ball; tennis

4. He has _______  tennis rackets.

A. 5

B. 12

C. 10

D. 4

5. He has _______ soccer balls.

A. 5

B. 12

C. 10

D. we don't know

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单项选择题

解析法测定界址点坐标相对邻近图根点的点位中误差，不得大于（）cm。

A.±2

B.±3

C.±5

D.±8
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