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问题 单项选择题 B型题

黑圆点在V行中代表（）。

A.激动起源点在心室

B.激动起源点在心房

C.激动起源点在窦房结

D.室内差异性传导

E.激动起源点在房室交界区

答案

参考答案：A

问答题

中国的民族工业为什么会在一战后现短暂的春天？

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

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单项选择题

地西泮的肌松作用是通过（）

A.阻断多巴胺受体

B.阻断神经接头乙酰胆碱释放

C.阻断突触膜受体

D.抑制脑干网状结构内和脊髓内的多突触通路

E.加速乙酰胆碱分解
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