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问题 单项选择题

常用放射性药物与普通药物的相互作用下列哪项不正确（）。

A.过氯酸钾可使异位胃黏膜99mTcO4-显像呈假阳性

B.烟草酸可致99mTc-EHIDA肝显像中肝吸收少而清除极缓慢

C.局部注射含钙物质可使99mTc-MDP骨显像局部放射性浓聚

D.双膦酸化合物可使99mTc-PYP心肌梗死显像呈假阴性

E.过氯酸钾可使异位胃黏膜显像呈假阴性

答案

参考答案：A

解析：过氯酸钾可封闭甲状腺、胃黏膜，使其不能摄取99mTcO4-，因此异位胃黏膜也不摄取99mTcO4-而呈阴性。

阅读理解

阅读理解。

                                                      Thanks for Saving Me

    Nasreddin woke up in the middle of the night and saw something white in his garden. It seemed to be

moving towards the house.

    "That is a thief(小偷)!"He thought,and he took his gun and shot(开枪)at him. Then he went back to

bed,because he was too frightened(害怕)to go out of the house in the dark.

    The next morning Nasreddin went out and saw one of his white shirts hanging on the clothes-line in the

garden. His wife had washed it the day before and hung it out to dry. Now it had a bullet-hole right through middle of it.

    "My God,"said Nasreddin, "I was lucky last night. If I had been wearing that shirt, the bullet would have killed me!"And he called his neighbors together and asked them to thank God for saving him.

1. At midnight Nasreddin saw ________ in his garden.

A. something strange

B. a thief 

C. something white

D. a ghost

2. Nasreddin was so frightened that he ____________ .

A. cried out for help

B. dared not go out of the house

C. dared not stay in his house

D. couldn't say a word

3. The next morning Nasreddin found ___________ .

A. his wife in the garden

B. the clothes-line

C. the thief dead

D. a bullet-hole through the white shirt

4. Nasreddin said that if he had been wearing that shirt ____________ .

A. he would be killed

B. he would die

C. he would have killed

D. he would have been killed

5. He called his neighbors together in order to __________ .

A. make a speech.

B. tell the story

C. thank God

D. thank them
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单项选择题

在一台车床上，用一把车刀对一段外圆以不变的切削量作三次切削的工艺过程为（）。

A.3个工步

B.1个工步

C.1次进给

D.一个工序
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