问题
多项选择题
P-R间期延长>0．21秒见于（）
A.干扰
B.交界性早搏
C.等频性干扰性房室脱节
D.房室结慢经路向前传导
E.一度房室传导阻滞
答案
参考答案：A, D, E
搜题请搜索小程序“爱下问搜题”
P-R间期延长>0．21秒见于（）
A.干扰
B.交界性早搏
C.等频性干扰性房室脱节
D.房室结慢经路向前传导
E.一度房室传导阻滞
参考答案：A, D, E
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| Spend time in a bookshop can be enjoyable. If you go to a good shop, no __1__ will come near to you and say, "Can I help you?" You __2__ buy anything you don't want. You may try to find out __3__ the book you want is. But if you fail, the assistant will lead (引导) you there and then he will go away. It seems that he is not __4__ in selling any books at all. There is a story which tells us about a good shop. A medical student __5__ a very useful book in the shop, __6__ it was too expensive for him to buy. He couldn't get it from the library, either. So every afternoon, he went there to read __7__ at a time. One day, however, he couldn't find the __8__ from its usual place and was leaving when he saw an assistant signing to him. To his surprise, the assistant __9__ to the book in a corner, "I put it there so as not to be __10__ out." said the assistant. Then he left the student go on with his reading. | |||
| ( ) 1. A. assistant ( ) 2. A. won't ( ) 3. A. what ( ) 4. A. surprised ( ) 5. A. bought ( ) 6. A. but ( ) 7. A. little ( ) 8. A. book ( ) 9. A. went ( ) 10. A. sold | B. waiter B. needn't B. which B. surprising B. found B. and B. a little B. shop B. used B. taken | C. police C. mustn't C. where C. interesting C. read C. so C. few C. assistant C. pointed C. found | D. teacher D. can't D. when D. interested D. took D. or D. a few D. shopkeeper D. left D. watched |