问题
单项选择题
室性心动过速的正确描述是（）
A．心率100-150 次/分
B．听诊心律轻度不规则，第一心音强度固定不变
C．有房室分离，心房率大于心室率
D．起源于希斯束分支以下部位的心动过速
E．同步直流电复律常作为首选治疗
答案
参考答案：D
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室性心动过速的正确描述是（）
A．心率100-150 次/分
B．听诊心律轻度不规则，第一心音强度固定不变
C．有房室分离，心房率大于心室率
D．起源于希斯束分支以下部位的心动过速
E．同步直流电复律常作为首选治疗
参考答案：D
Do you know Australia? Australia is the largest island in the world. It is a little smaller than China. It is in the south of the earth. 1 The population of Australia is nearly as large as that of Shanghai. 2 The cities in Australia have got little air or water pollution. The sky is blue and the water is clean. You can clearly see fish swimming in the rivers. Plants grow very well. Last month we visited Perth, the biggest city in western Australia, and went to a wild flowers’ exhibition 3 We had a wonderful time. Perth is famous for its beautiful wild flowers. In spring every year Perth has the wild flowers’ exhibition. After visiting Perth, we spent the day in the countryside. We sat down and had a rest near a path at the foot of a hill. It was quiet and we enjoyed ourselves. Suddenly we heard bells ringing at the top of the hill. 4 There were about three hundred sheep coming towards us down the path. 5 After a short drive from any town, you will find yourself in the middle of white sheep. Sheep, sheep, everywhere are sheep.
F. There we saw a large number of wild flowers we had never seen before. G. The people of Australia are very hardworking. |