Earth day and Mars day is of similar length.
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Both the Earth and the Mars have water.
A. 对
B. 错
Earth's air has the same component with that of Mars.
A. 对
B. 错
伸顶通气管高出屋面不小于()m,大于该地区最大积雪厚度。
A. 0.1
B. 0.2
C. 0.3
D. 0.5
大便器最小管径为()mm。
A. 50
B. 75
C. 100
D. 150
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