一 These clothes are all out of date. Let's go and buy some new clothes.
一 I can't agree more. Let's go.
A:expensive
B:old-fashioned
C:tight
李大爷家有4头牛,68千克草.平均每头牛吃多少千克?
一种抗生素为粉末状固体,每瓶含0.5g,注射时应配成质量分数为20%的溶液,则使用时每瓶至少需加入蒸馏水( )
计算:(2015)0+3﹣1=____ .