人到三十、四十、五十、六十、七十、八十岁分别称什么?
参考答案:而立之年;不惑之年;知天命之年;花甲之年;耳顺之年;杖朝之年
Thanks for listening to my problem and_____. [ ]
A. give me your advice
B. giving me your advice
C. give me your advice
D. giving me your advices
全口义齿的固位力主要依靠()
A.摩擦力
B.约束力
C.大气压力
D.吸附力
E.粘结力