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1131、Chemical oxygen-generating systems require less space land weigh less than gaseous oxygen systems supplying thesame Number of people.

A
 Comparing with the chemical oxygen-generating systems when providing oxygen to the same amount of people, thegaseous oxygen systems are lighter and smaller.
B
 When providing oxygen to the same number of people, compared with the gaseous oxygen systems, chemicaloxygen-generating systems need less space and have lighter weight.
C
 Gaseous oxygen systems haves lighter weight and bigger size than chemical-generating systems when supplying air to thesame number of people.

答案解析

正确答案:B

解析:

解析:注释:辨别清楚谁需要更少的空间和重量。

相关知识点:

化学制氧省空间,重量较轻

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