快挥发性冷底子油，喷涂在终凝后的水泥基层上干燥时间为______h。
A. 2～4
B. 4～8
C. 1～2
D. 5～10
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保温层设置存防水层______部时，保温层的上面应做找平层。
A. 上
B. 下
C. 侧而
D. 中
A tree can be considered as a kind of pump in the following two ways: ______.
A. Making the ground far more loosely made up and increasing the humidity of the surrounding land.
B. Sucking up water from the ground and increasing the humidity of the surrounding land.
C. Sucking up water from the ground and keeping the surrounding land drier.
D. Making the ground far more lorry made up and keeping the surrounding land much drier.
According to the text, good doctors' main object of their lives is _______.
A. earning much fees.
B. curing the sick even if they lose their fees.
C. losing their fees.
D. making much money by curing their patients.
当屋面防水等级为Ⅰ级、Ⅱ级时，不宜采用______屋而。
A. 架空
B. 种植
C. 蓄水
D. 倒置式
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