0,3,6,9,____,____,____,____,____,____,____,____,36.
人体消化食物和吸收营养物质的主要器官是( )
制作洋葱鳞片叶表皮细胞和人口腔上皮细胞的临时玻片标本时,在载玻片上滴的液体分别是( )
—Jack, please don't play the CD, or please ________. Father is sleeping.— OK. No problem.
— Yes. It is ____________ to hold more than one thousand people.