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______ cannot live without oxygen. [br] Pure oxygen is provided for ______ .A、re
______ cannot live without oxygen. [br] Pure oxygen is provided for ______ .A、re
游客
2023-10-05
17
管理
问题
______ cannot live without oxygen. [br] Pure oxygen is provided for ______ .
选项
A、research workers in high mountains
B、children
C、patients
D、both A and C
答案
D
解析
本题题干问“纯氧经常是提供给谁”。原文第1段第3句话指出医院里的病人和在山区工作的研究人员需要纯氧。因此选项D.both A and C是正确答案。
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