分拣作业按照其实施的手段不同可以分为人工分拣和机械分拣。()
参考答案:错
有一小木块,把它盛在装满水的溢水杯中静止时,从杯中溢出2N的水;若把它浸在盛满酒精的溢水杯中静止时,木块处于 状态(选填“悬浮”“漂浮”或“沉底”),会从杯中溢出 N的酒精。(ρ木<ρ酒精<ρ水,水与酒精足够多)
A.It was great. B.What’s the matter C.How about the green one D.Are you free tomorrow E.Thanks,but I am full.
A:Help yourself to some dumplings. B:______