问题
单项选择题
患者，3天来下后牙遇冷水痛，吐出后痛持续10秒，平时无明显不适。该患者最可能的牙病是()
A．慢性牙髓炎
B．楔状缺损
C．可复性牙髓炎
D．急性牙髓炎
E．邻面中龋
答案
参考答案：C
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患者，3天来下后牙遇冷水痛，吐出后痛持续10秒，平时无明显不适。该患者最可能的牙病是()
A．慢性牙髓炎
B．楔状缺损
C．可复性牙髓炎
D．急性牙髓炎
E．邻面中龋
参考答案：C
Do you know 21 languages there are in the world? There are about 1500, but many of them aren’t very 22 . English is one of the most important languages because many people 23 it, not only in England and America, 24 in other countries of world. About 375000000 people speak it 25 their own language, and another 375000000 use it as 26 language. It is 27 to say how many people are learning it. 28 boys and girls in schools are trying to do so. Many English children study French. French is also a very important language. 29 children study German, Russian, Japanese and Chinese. What is the best 30 to learn a language? We know that we all learnt 31 language well when we were 32 . If we learn a second language in the 33 way, it won’t seem so difficult. What does a small child do? It 34 what people say, and it tries to guess what it hears. When it wants something, it has to 35 it. It is using the language, 36 in it and talking in it all the time. If people use a second language 37 , they will learn it 38 . In school, you learn to read, to write, to hear and to speak. It is best to learn all new words through the 39 .You can read them, spell them and 40 them later.
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