According to the speaker, __________ contributed to her admi According to the speaker, __________ contributed to her admission to Ohio State 分类:专四 题型:单选题 查看答案
促进红细胞成熟的因子是( ) 促进红细胞成熟的因子是( ) A.维生素B12 A.维生素B12 B.维生素K B.维生素K C.Fe2+ C.Fe2+ D.维生素E D.叶酸 E.叶酸 分类:专四 题型:单选题 查看答案
质量是5 kg的物体,在水平恒定拉力F=20 N的作用下,从静止开始经2s速度达到2m/s,则物体 质量是5 kg的物体,在水平恒定拉力F=20 N的作用下,从静止开始经2s速度达到2m/s,则物体 分类:专四 题型:单选题 查看答案
What do the two people mainly talk about? What do the two people mainly talk about?A.Whether small children should go to n 分类:专四 题型:单选题 查看答案