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问题 单项选择题

用于治疗阵发性室上性心动过速的最佳药物是

A．奎尼丁

B．苯巴比妥

C．维拉帕米

D．普鲁卡因胺

E．利多卡因

答案

参考答案：C

解析：
维拉帕米阻滞心肌细胞膜慢钙通道，抑制窦房结和房室结等慢反应细胞 Ca2＋内流，抑制4相缓慢除极，使自律性降低，房室传导减慢，ERP延长，用于治疗阵发性室上性心动过速的首选药物。

补全对话，情景问答

根据对话情景和所给首字母，在空格内填入一个适当的单词，使对话意思完整。

(Z= Zhang Li      L=Li Ping)

Z: You are in a new school now, right?

L: A very big school. It has five buildings in it.

Z: How many 1.c____ are there?

L: There're thirty. There are about forty students in each class.

Z: Are your teachers and classmates good to you?

L: Yes, they are very  2. h____. They often help me with my study.

Z: Do you have a  3. p____?

L: Yes, it's very big, too. We often play football and have 4. o____ activities there.

Z: How many 5. l____  do you have a day?

L: Six. 6. F____ in the morning and two in the afternoon.

Z: Which is your 7. f____ lesson?

L: 8. C____. I love 9. r____ Chinese stories. I'm in the Reading

   10.C____. We often do some reading in the school library.

    I enjoy my new school so much.

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单项选择题 A2型题

一早产儿，生后母乳喂养，每次吃奶后有少量奶汁溢出，生长发育情况良好，最可能的原因是（）

A.溢乳

B.幽门痉挛

C.胃食管反流

D.喂养不当

E.消化道畸形
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