下列计量单位全都属于法定单位的是()。
A.公尺、公分、公亩
B.大卡、马力、度(用于电能量)
C.公斤、公里、公顷
D.尺、两、亩
E.海里、分贝、原子质量单位
参考答案:C, E
甲、乙两人独立解出某一道数学题的概率相同。已知该题被甲或乙解出的概率为0.36。求:(I)甲独立解出该题的概率。(II)恰有1人解出该题的概率。
When he retired and went back home in _____ , he was already in ____ . [ ]
A. the fifties ; his sixty
B. fifties ; his sixties
C. the fifties , his sixties
D. fifty , sixty