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单选题
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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