对右图的操作，解释正确的是
A．如果是图中的A处出血，则一定的动脉出血
B．如果是图中的B处出血，则一定的静脉出血
C．如果图中B处流出的血呈鲜红色，则一定的静脉出血
D．图中表示的是指压止血法
答案：A
因为动脉是将血液从心脏送到身体各处的血管，所以应该在心脏的远心端止血，即图中所按处；而静脉是将全身的血液送回心脏的血管，所以如果是静脉出血，则在远心端止血，所以本题答案为A。
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| American people like to say "Thank you" when others help them or say something kind to them. People of many other 1 do so, too. It is a very 2 habit (习惯). You should say "Thank you" when someone passes you the salt on the table, when someone 3 before you keeps the door 4 for you, when someone says you have done your work 5 , or you have bought a nice thing, or your city is nice. "Thank you"is used not only 6 friends, but also between parents and 7 , brothers and sisters, husbands and wives. "Excuse me" is 8 short sentence they use. When you hear someone say it 9 you, you know that somebody wants to walk past you. It is not polite to break others while they are 10 . If you want to speak to one of them, say "Excuse me " first, and then begin talking. You should also do so when you want to cough or make any unpleasant noise before others. |