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【简答题】
成本一效益分析(cost-benefit analysis，CBA)
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【单选题】自然通风系统常用的通风筒形式有：（） ①、烟斗式；②、排风筒；③、鹅颈式；④、菌形通风筒；⑤、空调
A.
①、②、③、④、⑤
B.
①、②、③、⑤
C.
①、②、③、④
D.
①、②、④、⑤
【单选题】_________you have expressed your fierce determination to get it right, you should act immediately.
A.
Even though
B.
Ever since
C.
Now that
D.
As though
【单选题】You don't have to ______ yourself. I think you did the right thing putting your mother in a nursing home.
A.
justify
B.
hinder
C.
indulge
D.
appoint
【单选题】某民用建筑工程中，空调通风系统按中压系统选用，所有空调送、回风管，新风管均采用复合风管（包括设置于管井内的）；排烟系统风管按高压系统选用，防排烟系统风管采用镀锌钢板。常用消声器中对中、高频有良好的消声效果为（）
A.
矩形阻抗复合式消声器
B.
末端消声器
C.
组合消声器
D.
微孔板消声器
【简答题】求下列函数的极值: (1) (2)
【单选题】—Have you finished your homework? —Sorry .I’ll do it __________.
A.
right away
B.
wrong way
C.
right side
【简答题】A．Brush your teeth right before you go to bed in the evening. B．Have as few of your teeth pulled out as possible. C．Have your teeth Xrayed at regular intervals. D．Clean your teeth shortly after eating...
相关题目：
【单选题】自然通风系统常用的通风筒形式有：（） ①、烟斗式；②、排风筒；③、鹅颈式；④、菌形通风筒；⑤、空调
A.
①、②、③、④、⑤
B.
①、②、③、⑤
C.
①、②、③、④
D.
①、②、④、⑤