釉质龋中脱矿最严重的区域是()。
A.透明层
B.暗层
C.病损体部
D.表层
E.脱矿层
参考答案:C
解析:釉质龋中病损体部脱矿严重,孔隙容积占5%~25%。
This English book __________ five parts, __________ grammar.
A.includes; including
B.contains; including
C.includes; containing
D.contains; containing
个位上是3、6、9的数一定是3的倍数。[ ]