题目

根据句意，用所给单词的适当形式填空。 1.To be a successful man doesn’t just mean to be a _________(wealth) man. 2. Five ________(twelve) of the population in this factory are women. 3.Everyone should make a contribution to ___________ (protect) the environment. 4.I think watching table tennis match is ___________(simple) a waste of time. Why not take a      walk in the garden, dear? 5.What great problems they have __________( pronounce) the word correctly.把一个木球放入盛满酒精的溢水杯中，溢出50g酒精；若将此木球从酒精中取出，擦干后放入盛满水的溢水杯中，则溢出水的质量是(ρ木=0．6x103kg／m3, ρ酒精=0．8x103kg／m3)   A．等于50g    B．小于50g    C．大于50g     D．无法确定