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【单选题】
Why was University Tower torn down?A.
Because a bell tower was to the built on the site.
B.
Because it was found unsafe.
C.
Because a parking lot was to be constructed there.
D.
Because no one wanted to preserve it.
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举一反三
【单选题】含碳量( )的铁碳合金，我们称为过共析钢。
A.
<0.0218%< /div>
B.
0.0218～0.77%
C.
0.77～2.11%
【简答题】(______)是标准展台上标有参展商名称、机构标志和展台编号等有关信息的展板
【简答题】水泥混凝土的优缺点点有哪些？