第12题: [单项选择]A growing plant needs water for all of the following except ______. A. forming sugars B. sustaining actively growing parts as well as woody stems C. absorbing mineral elements D. taking in carbon dioxide from the air 参考答案:D 答案解析:事实判断归纳题。选项A(形成糖分)在第1段第6句得以体现:空气中的二氧化碳作为气体进入叶片,与叶片中所含水分溶解后,才与其中一部分水结合,形成单糖。再根据第2段第4句:叶片表层有大量微孔可供二氧化碳进