理论上,全口义齿修复的最佳时机应在失牙后
A.1个月
B.2个月
C.3个月
D.6个月
E.1年
参考答案:C
Most men don't cry ______, but they sometimes cry when they are alone.[ ]
A. in public
B. on purpose
C. by accident
D. in peace
对粒度较粗的产品脱介,较粒度细的产品脱介用水量()。
A.多
B.少
C.不一定
D.相同