问题
单项选择题
患儿，女，7岁，乳牙龋坏较多，已充填。六龄牙已萌齐，窝沟深，部分窝沟有着色，无明显龋坏，要求预防。
操作过程中下面哪一项不正确
A．用不含氟的清洁剂清洁牙面
B．酸蚀前吹干牙面
C．用沾有液体酸蚀剂的棉球反复擦拭牙面
D．酸蚀后加压冲洗10～15秒
E．在不影响咬合的情况下尽可能涂厚一点
答案
参考答案：C
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患儿，女，7岁，乳牙龋坏较多，已充填。六龄牙已萌齐，窝沟深，部分窝沟有着色，无明显龋坏，要求预防。
操作过程中下面哪一项不正确
A．用不含氟的清洁剂清洁牙面
B．酸蚀前吹干牙面
C．用沾有液体酸蚀剂的棉球反复擦拭牙面
D．酸蚀后加压冲洗10～15秒
E．在不影响咬合的情况下尽可能涂厚一点
参考答案：C
| 阅读下面的短文，从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。 | ||||
| The most difficult thing for university student Shaun Rogers is opening the classroom door by himself. Shaun can't do this without 1 because he is only six years old. He's the 2 person ever to study at Rochester University in New York. Shaun began 3 at two and by the age of five he had read many books and was able to finish writing his 4 book. "I love learning", says Shaun. "My hero is the scientist Albert Einstein 5 he never combed (梳理) his hair or wore socks." Shaun's mother first realized that her son was 6 when he kept crying at playschool because he was bored with the children's games. She started teaching him at home 7 finding that local schools were not prepared for children who 8 at Shaun's speed. Now Shaun is studying geography at 9 and using the Internet to finish his high school studies. However, some scientists warn that too much study can stop a child from developing normally. "I don't care how clever the kid is, six-year-olds have to 10 with their friends," says Dr. Brain Wood. Mrs. Rogers disagreed that all her son's time was taken up by school work. "He loves the violin and has many outdoor 11 , such as camping, fishing and swimming, just like 12 boys of his age." | ||||
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