根据首字母填空。

1. Be careful. There is a wine b_______ on the table. You might break it.

2. The number after twenty-nine is t_______.

3. Have you e________ been to the Great Wall?

4. It's dangerous to d________ a car after you get drunk.

5. Your parents are your f________ and mother.

6. If a dream comes t________, it actually happens.

7. W________ is the coldest season of the year.

8. When snow f________, it comes down from the sky.

9. It's best to water plants either e________ in the morning or late at night.

10. We don't go to the c________ much for movies because we have a video.

心房扑动的特征是（）.

A.心室率通常为100～160次／分

B.心室率规则

C.QRS波群形态正常

D.扑动波之间等电位线消失

E.P波消失代之以规律的锯齿状扑动波