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问题 多项选择题

迷走神经兴奋时（）

A.延长窦房结与周围组织不应期

B.缩短窦房结与周围组织不应期

C.减慢房室结的传导

D.抑制窦房结自律性与传导性

E.加快房室结的传导

答案

参考答案：A, C, D

填空题

图所示的电路，电源电压为6V，灯泡L1和L2分别标有“6V 6W”和“6V 3W”字样。如果将S1、S2、S3分别换成电流表、电压表、电流表，则电压表的示数为____ V；如果将Sl、S2、S3分别换成电压表、电流表、电压表，则电流表的示数为____ A。
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填空题

CONVERSATION 1 (Questions 1-4)


A fire started about (1) o’clock in the morning.
It was believed the fire was started by someone (2) in bed.
M: Even more serious is the harm to the apartment’s (3) .
M: The best thing to protect oneself is to have a smoke alarm and a fire (4) .
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