问题
多项选择题
Ⅱ度Ⅰ型窦房传导阻滞的心电图表现是（）。
A.P-P间距逐渐缩短至脱漏
B.间歇后的P-P时间小于两个短的P-P间距
C.间歇后的P-P时间大于两个短的P-P间距
D.间歇后的P-P间距大于间歇前的P-P间距
E.P-P间距逐渐延长至QRS脱漏
答案
参考答案：A, B, D
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Ⅱ度Ⅰ型窦房传导阻滞的心电图表现是（）。
A.P-P间距逐渐缩短至脱漏
B.间歇后的P-P时间小于两个短的P-P间距
C.间歇后的P-P时间大于两个短的P-P间距
D.间歇后的P-P间距大于间歇前的P-P间距
E.P-P间距逐渐延长至QRS脱漏
参考答案：A, B, D
根据短文内容，用方框中所给词的适当形式填空
There are many different ways to spend our free time. Almost everyone has some kind of 3 . It may be something from colleting stamps to 4 model planes. Some hobbies are very expensive, but others don't cost anything at all. Some collections are worth 5 of money, others are valuable only to their owners. I know a man who has a coin collection worth several 6 dollars. A short time ago he bought a rare fifty-cent piece which cost him $ 250! He was very happy about this collection and thought the price was all right. On the other hand, my youngest brother collects match boxes. He has almost 600 kinds of them, but I wonder 7 they are worth any money. However, to my brother they are quite valuable. 8 makes him happier than to find a new match box for his collection. That's what a hobby means, I think. It is something we 9 to do in our free time just for the fun of it. The value in dollars is not 10 , but the pleasure it gives us is. |