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问题 单项选择题

具有体内、外抗凝血作用的药物是

A．阿司匹林

B．肝素

C．香豆素类

D．右旋糖酐

E．链激酶

答案

参考答案：B

选择题
The coal miners ____ in the coal mine for 10 hours before we came to their rescue.

A. had trapped
B. had been trapping
C. had been trapped
D. would have been trapped
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单项选择题 A1/A2型题

患者男，17岁。患上呼吸道感染1周后，感心悸，气短，乏力，心率90次／分，心电图示，P-R间期为0.22秒，应诊断为（）

A.窦性心动过速

B.二度Ⅰ型房室传导阻滞

C.窦性心律不齐

D.二度Ⅱ型房室传导阻滞

E.一度房室传导阻滞
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