已知冰的密度为0.9×103kg/m3，一块体积是80cm3的冰全部融化成水后，水的质量是______ g，水的体积是______ cm3。
72；72
_____ is known to all, China will be an ______ and powerful country in 20 or 30 years' time. [ ]
A. That; advancing
B. This; advanced
C. As; advanced
D. It; advanced
月经定期三月一行者，称为（）
A.并月
B.激经
C.暗经
D.居经
E.避年
