【单选题】一等截面直肋的厚度为δ.材料导热系数为A,肋表面与环境之间的表面传热系数为h,则通过该直肋片的导热可以近似作为一维导热问题处理的条件是。
【单选题】These days a green building means more than just the color of the paint. Green building can also refer to environmentally friendly houses, factories, and offices. Green building means' reducing the im...
B.
an energy-saving building
C.
a green-colored building
D.
a water-reducing building
【单选题】We have to ______ the wall ______. [ ]