本题目来源于试卷: IB ESS Unit 1 Foundations of ESS，类别为 IB环境系统与社会
[单选题]
Identify the exchanges that a closed syk+ffk;:c /xw 9zcpsm5 c csp3 litr5 (9w1ibx(st dg3,9c0pmyg wem makes with the environment.
I. Energy
II. Matter
A. I only
B. I only
C. Both I and II
D. Neither I nor II
参考答案: A
本题详细解析:
A closed system exchanges only energy and not matter across its boundagc*zcx0rnm ; 9vm-8shries. This is rare. The earth could be an example. Solar energy enters the earth’s atmosphere. Some is reflected back to space a x-msz8v nh g9c0r*;mcs is some heat that is reradiated from the earth. Matter is exchanged in extremely small quantities, for example an occasional meteor entering and satellites leaving.
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