问题
单项选择题
哪个牙称为“闪龄牙”
A．A3
B．B4
C．C5
D．D6
E．CV
答案
参考答案：D
解析：上下颌第一磨牙六岁左右即萌出，故称为六龄牙。
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哪个牙称为“闪龄牙”
A．A3
B．B4
C．C5
D．D6
E．CV
参考答案：D
解析：上下颌第一磨牙六岁左右即萌出，故称为六龄牙。
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The holidays are the best 2 of the year for most children. They can 3 most of their time in swimming. camping and traveling with their parents. The most enjoyahle place is the seaside. Some children are lucky enough to live near the 4 , but for those who live far from the sea, their parents will take them to the seaside for the holidays. Why do children 5 . spending their holidays at seaside? It's because they like the sand, the sun, the 6 wind and the sah water there more than anything else. Of course, there are lots of new things to see, nice things to eat 7 exciting things to do. |