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One way of producing cold is to allow ______ . [br] Small holes are useful in re
One way of producing cold is to allow ______ . [br] Small holes are useful in re
游客
2023-10-07
30
管理
问题
One way of producing cold is to allow ______ . [br] Small holes are useful in refrigeration because they ______ .
选项
A、can change gases into liquids
B、can turn oxygen into a liquid
C、can allow molecules to go quicker
D、can make molecules further apart
答案
A
解析
本题题干问“为什么小洞在制冷过程中是很有用的”。原文第3段第1和第8句话指出通过小洞,气体可以变成液体。因此选项A. can change gases into liquids是正确答案。
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