题目内容：
Some children have never seen a dentist before starting school．
参考答案：
答案解析：
单选题：Some children have never seen a dentist before starting scho
- 题目分类：卫生类
- 题目类型：单选题
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Boys miss more school hours each year due to dental，―related
Boys miss more school hours each year due to dental，―related illness.
Dental and oral diseases are common in both adults and child
Dental and oral diseases are common in both adults and children
The town is famous for magnificent buildings.
The town is famous for magnificent buildings.
社会主义道德区别于一切旧道德的基本特征是（ ）
社会主义道德区别于一切旧道德的基本特征是（ ）
行政机关在作出（ ）等行政处罚决定之前，应当告知当事人有要求举行听证的权利。
行政机关在作出（ ）等行政处罚决定之前，应当告知当事人有要求举行听证的权利。