I love people _______ are polite and hard-working. [ ]
A. what
B. who
C. whose
D. where
答案:B
计算商中间有0的除法时,要注意除到哪一位,就把( )写在那一位上,哪一位如果不够除,就用( )占位。
有两种纽扣,A种用4角可买6个,B种用6角可买4个,A、B两种纽扣单价的最简整数比是(______:______).