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【简答题】
剪力墙结构的混凝土强度等级不应低于（），以短肢剪力墙为主的结构，其混凝土强度等级不应低于（）。
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反馈参考答案：
举一反三
【单选题】Although the dream of the home robot has not died, robots have had their greatest impact in factories. Unimate, the first industrial robot, went to work for General Motors in 1961. Even at a time when...
A.
the first robot of the world was designed in 1961 for General Motors
B.
the expensive computing power didn't hinder a robot's efficiency
C.
robots controlled by computers can do most tasks better than humans
D.
human workers often went on a strike when they were not satisfied in the past
【单选题】The goals of this project are to promote the commercialization of home-use robots, whose market is smaller than _______ for industrial robots, and to develop safety technologies and standards. [ ]
A.
it
B.
them
C.
that
D.
one
【简答题】《六一诗话》的作者是（）
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