单选题:维管束中运输水和无机盐的主要结构是( )。 题目分类:初中生物 题目类型:单选题 查看权限:VIP 题目内容: 维管束中运输水和无机盐的主要结构是( )。 A.伴胞 B.导管 C.筛管 D.韧皮部 参考答案: 答案解析:
符合中心法则的遗传信息传递方式是( )。 符合中心法则的遗传信息传递方式是( )。 A.蛋白质→RNA→DNA B.RNA→蛋白质→DNA C.DNA→RNA→蛋白质 D.DNA→蛋白质→RNA 分类:初中生物 题型:单选题 查看答案
请阅读短文,完成第题。Often heard people complain about, why not my fac 请阅读短文,完成第题。Often heard people complain about, why not my face, why so bad weat 分类:初中生物 题型:单选题 查看答案
If someone spends most of his days sitting, the following w If someone spends most of his days sitting, the following will be likely to be 分类:初中生物 题型:单选题 查看答案
Tea picked at the Qingming Festival is favored by people____ Tea picked at the Qingming Festival is favored by people__________its tendernes 分类:初中生物 题型:单选题 查看答案