消火栓的布置间距要综合考虑消火栓的保护半径的大小进行设置。
查看答案
低层消火栓系统中消防水箱的储备水量要满足灭火初期5min的用水量要求。
A. 对
B. 错
Question 1
A. Because they found lines of minerals which would require water to be created.
Because they found that life once existed on Mars.
C. Because they found freely flowing liquid water under the surface.
D. Because they had found evidence of life on Mars.
Question 2
A. There used to be more water on Mars than in Earth’s Arctic Ocean.
B. Mars used to be covered with water more than a hundred meters deep.
C. Nearly all the water on Mars has evaporated into space.
D. Evidence of water on Mars has never been found before.
Question 1
A. 14
B. 20
C. 30
D. 63
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