在中、小学教室设计中,需要适当提高照度的地方是()。
A、学生课桌面
B、黑板
C、黑板和讲台
D、内墙附近
参考答案:C
—You look great! Were you on vacation or ________?
—You got it. I've just come back from America.
A.anything
B.nothing
C.everything
D.something
属于一级预防的是
A.窝沟封闭B.根管治疗C.口腔健康教育D.预防性充填E.早期充填