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【单选题】There are approximately three quarters of a ton of termites (白蚁) for every person on Earth. It now turns out that these critters may be helping to alter the climate and affect man’s life. For years sc...
A.
It is the production by termites that is now of greater concern.
B.
What scientists worry more about is the output from burning fuels.
C.
The output from burning fuels is now rising steadily.
D.
The burning of fuels generates much less carbon dioxide than termites do.
【单选题】There are approximately three quarters of a ton of termites (白蚁) for every person on Earth. It now turns out that these critters may be helping to alter the climate and affect man's life. For years sc...
A.
low temperatures are created by using a house
B.
the house is made green in order to keep heat
C.
heat is prevented from escaping outside
D.
everything is kept green in a house
【单选题】按《建筑地基基础设计规范》GB50007-2011的规定,从下列荷载效应取值中选择正确的方法( )。
A.
按地基承载力确定基础底面积：作用效应按承载能力极限状态下作用效应的基本组合，采用相应的分项系数数
B.
计算地基变形：作用效应按正常使用极限状态下作用效应的标准组合。
C.
计算地基稳定： 作用效应按承载能力极限状态下作用效应的基本组合，其分项系数均为1.0。
D.
确定基础高度和配筋： 作用效应按正常使用极限状态下作用效应的准永久组合，不计入风荷载和地震作用。