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问题 单项选择题 A3/A4型题

男性，72岁。因"反复头晕1个月"入院，无冠心病、糖尿病、高血压病史。入院血压110/60mmHg。血压动态心电图示窦性心动过缓，最慢心室率28/分钟，P-R间期为0.28秒。

患者目前诊断为（）

A.病态窦房结综合征

B.一度房室传导阻滞

C.急性前壁心肌梗死

D.房颤

E.窦性心动过缓

答案

参考答案：A

阅读理解

根据对话内容，把对话中所叙述的地方标注在下图中空格中。

A: Would you like(愿意) to come to dinner this evening?

B: I'd love to. But how can I get there?

A: Let me tell you. You can take the No. 3 bus. The bus stop(车站) is in front of the post office. You get  off (下车)on Xinhua street, when you can see a Movie House on your left and the bank on the right. Then you walk on and turn left at the second crossing(十字路), just across from the Food Store, there is a building (建筑物). It's the library. My house is next to the library.

B: Oh, Ok. See you.

A: See you soon.

1___________ 2___________  3___________4__________ 5___________
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解答题
先化简比，再求比值：
5
8
：15=
0.8：
3
4
=
1.5：
3
5
=
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