问题
单项选择题 B型题
处理不当患者咳嗽或吹气时上总义齿易于脱落的是（）
A.主承托区
B.副承托区
C.缓冲区
D.边缘封闭区
E.后堤区
答案
参考答案：E
解析：1.上颌义齿常由硬区相应的基托组织面未做缓冲引起，下颌多是与外斜嵴、下颌隆突区相应基托组织面未做缓冲引起。2.上颌全口义齿主要靠大气压力固位，而边缘封闭是密合获得大气压力的前提。
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处理不当患者咳嗽或吹气时上总义齿易于脱落的是（）
A.主承托区
B.副承托区
C.缓冲区
D.边缘封闭区
E.后堤区
参考答案：E
解析：1.上颌义齿常由硬区相应的基托组织面未做缓冲引起，下颌多是与外斜嵴、下颌隆突区相应基托组织面未做缓冲引起。2.上颌全口义齿主要靠大气压力固位，而边缘封闭是密合获得大气压力的前提。
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| "Imagine you are walking along the road. Suddenly you fall over and all the passers-by burst into laughter. You feel very 1 and think the world is laughing at you . But in fact, five minutes later, they have 2 it ever happened." The other day when I came across these words in an article, I didn't agree with the 3 . The author thinks the best thing to do in this kind of 4 is to pretend nothing has happened, and so avoid 5 trouble. I admit that we should keep 6 because "Your tears will only remind others of what happened, while your 7 can let them forget it." But this is far from satisfactory. We should do 8 to make things better. I used to be a(n) 9 girl and not very good at maths. Our new maths teacher asked me a question and I still remember how I hung my head in 10 when I couldn't answer it. "If you don't know the answer, just tell me." the teacher said, "If you don't how can I know 11 you know the answer or not?" All of my classmates burst into laughter. My face turned red but the teacher 12 me to go to the blackboard and 13 what I knew. If I had 14 the words in the article, I would have given up. But I tried my best. And to everyone's 15 , I succeeded! The teacher smiled and said, "Well done! I 16 you could do it!" Since then, I have become active in maths as 17 as in other subjects. I used to think doing maths exercises was a waste of time. But now, I know 18 I do can make things better. Everyone is the 19 of his own fate. If we make mistakes, we should take on an active 20 . Laugh, and the world laughs with you; weep (哭泣), and you weep alone. | ||||
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