宿主龋齿非易感性表现在
A.糖的摄入量多
B.氟的摄入量多
C.口腔菌斑量多
D.牙齿窝沟点隙多
E.漱口次数少
参考答案:B
--_____________
-- I can’t move the box. Can you help me?
A.What do you do?
B.What’s the problem?
C.What can you do?
D.How are you?
空调压缩机电磁离合器的间隙一般为()mm。
A、0.1~0.3
B、0.3~0.5
C、0.5~1.0