本题目来源于试卷: SL/HL Topic B 3.1 Gas exchange，类别为 IB生物学
[单选题]
1. Which of the following apply to gaseous exchange w8p d6.:ohsy9xs a:*r;yj5c5wixih j in a leaf and in the lungv+ 3 c7.9dc oazm6qd,fiklh: r?
I. Oxygen moves down its concentration gradient.
II. Gases move by active transport.
III. Gases dissolve before entering the cells.
IV. Oxygen and carbon dioxide diffuse in opposite directions.
A. All of the above
B. IV only
C. I, II and III only
D. I, III and IV only
参考答案: D
本题详细解析:
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