问题
单项选择题
影响窝沟封闭效果的因素不包括（）
A.唾液污染
B.早期龋的存在
C.添加氟化物
D.未彻底冲洗
E.未完全干燥
答案
参考答案：C
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影响窝沟封闭效果的因素不包括（）
A.唾液污染
B.早期龋的存在
C.添加氟化物
D.未彻底冲洗
E.未完全干燥
参考答案：C
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| If we take a close look at successful language learners, we may discover a few techniques (技巧) which make language learning easier for them. 1 , successful language learners are independent learners. They do not depend on (依赖) books or teachers; they 2 their own way to learn the language. They try to find the patterns and the reles for themselves 3 waiting for the teacher to explain everything. They are good guessers who look for clues and form their 4 conclusions which are very different from others'. Successful language learning is 5 learning. Therefore.successful learners do not wait for a chance to use the language; they 6 such a chance. They find people who speak the language and ask these people to correct them 7 they make mistakes. They will try anything to communicate. When communication is difficult, they can 8 information that is incompleate (不完整的). It is more important for them to learn to 9 in the language than to know the meaning of every word. Finally, successful language learners are learners with a 10 in order to communicate with these people and learn from them. They want to learn a language because they are interested in the language and the people who speak it. It is necessary for them to learn the language. | ||||
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