问题
单项选择题
关于强心苷对心肌电生理特性的影响，正确的是（）。
A.降低窦房结自律性
B.降低普氏纤维自律性
C.加快房室结传导
D.延长心房有效不应期
答案
参考答案：A
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关于强心苷对心肌电生理特性的影响，正确的是（）。
A.降低窦房结自律性
B.降低普氏纤维自律性
C.加快房室结传导
D.延长心房有效不应期
参考答案：A
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I'm very happy in my new school. I hope you're enjoying it. The teachers and students here are friendly to me. We go to school five days a week. I get to school at seven thirty, and 1 do you get to school? We have six classes every day, and 2 3 classes do you have? On 4 and 5 , the first class in Chinese. We have Chinese, 6 and English every morning. We have computer, history, P.E., 7 , 8 , geography, craft, politics every week, and we have 9 craft lessons a week. We have politics only 10 a week. My 11 subject is geography, and it's on 12 and 13 . Which subject do you like 14 ? How are you going 15 your lessons? Write soon. Yours, Jane |