2. 医学
  3. Dental______in children is a common phenomenon all over the world.

Dental______in children is a common phenomenon all over the world.

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问题 Dental______in children is a common phenomenon all over the world.
选项 A、detritions
B、decay
C、spoiled
D、rotten
答案B
解析 儿童龋齿是一个全世界普遍的现象。
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