问题
单项选择题
诊断阵发性室上性心动过速最有意义的是（）
A.心率>160/min
B.颈动脉窦按摩能增加房室传导阻滞
C.颈动脉窦按摩使心率突然减慢
D.颈动脉窦按摩使心率逐渐减慢，停止后心率复原
E.心律绝对规则
答案
参考答案：C
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诊断阵发性室上性心动过速最有意义的是（）
A.心率>160/min
B.颈动脉窦按摩能增加房室传导阻滞
C.颈动脉窦按摩使心率突然减慢
D.颈动脉窦按摩使心率逐渐减慢，停止后心率复原
E.心律绝对规则
参考答案：C
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| It was getting dark. Some children and two Canadian women were still 1 on the ice near a big hotel. They were having a good time. Suddenly the ice 2 , and one of the boys fell into the water. The children shouted "Help, Help" They didn't know 3 to do. The two Canadian women heard 4 and skated over to get the boy out of the water. The ice was 5 , the two Canadians fell into the water, too. But they tried their best to 6 the little boy. They knew they must be 7 . If they didn't push him up onto the ice, he would soon die. Many people ran over to 8 . Some of them had ropes and poles. A young man jumped into the water to save the 9 people. The boy and the two Canadians women were out of water at last. One of the women didn't feel well. She was sent to the 10 at once. But she felt very happy because the boy was safe. | ||||
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