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 clos(aultaz 09w3pq:sse4 ed systemb6m hh wkytoh2v- s;6;wh10ep 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 ni/b 0 qm+8hxnzot matter across its boundaries. This is rare. The earth could be an example. Solar energy enters the earth’s atmosphere. Some is reflected back to space as is some heat that is reradiated fbhi/nx0+q8 m zrom the earth. Matter is exchanged in extremely small quantities, for example an occasional meteor entering and satellites leaving.
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