SL/HL Topic B 3.2 Transport (id: 57a89c119)

本题目来源于试卷: SL/HL Topic B 3.2 Transport，类别为 IB生物学

[单选题]
3. Which is the best de4a9.p; o.zq(yfqsv fzeh3f/yscription of the blood fv3 )1qe2 0pi(ti (zenj8w jeurptd75 flow in a vein?

A. Blood flow is regular and towards the heart
B. Blood flow is irregular and towards the heart.
C. Blood flow is controlled by veins.
D. Blood flow is rapid and pulsar.


参考答案:  B


本题详细解析: 暂无

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