以下实验研究水分在植物体内的移动情况.把洋紫苏的茎放在盛有红色染液的烧杯中,3小时后,把枝条洗净,并在距枝条底部的不同位置切出切片.含有染液的部分显示有水分经过.实验装置和结果如下图所示. (1) 水分上升的主要动力来自 , 茎部横切面显红色的结构是 . (2) 在不同外界条件下,水分向上运输的速率会有所不同,试改变两种条件,使水分蒸发移动速率加快. . (3) 给你提供数枝洋紫苏,试利用类似上述根据对话内容,运用方框中所给的句子选项补全对话。选项中有一项是多余的。(5分)A: Excuse me.【1】B: No, it isn't. It's in the bookcase.A: How about my books? 【2】B: No, they aren't. They are on the chair.A: Oh, where's my pencil box?B: 【3】A:【4】B: It's under the table. And your basketball is under the chair.A: 【5】B: The keys? They're on the table.A: Thank you very much.B: You're welcome.A. Are they in the bookcase, too?B. It's on the sofa.C. Where are mom's keys?D. And where 's my schoolbag?E. Is my computer game on the table?F. They're under the desk.