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【判断题】
混凝土结构的耐久性指结构对气候变化、化学侵蚀、物理作用或任何其他破坏过程的抵抗能力。A.
正确
B.
错误
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举一反三
【单选题】— Shall we go and visit Mr. Wang tomorrow? — _____. [ ]
A.
It depends
B.
That depends on
C.
It is depended
D.
That depends so
【简答题】设全集U={a，b，c，d}，集合A={a，b}，B={b，c，d}，则（? U A）∪（? U B）=（ ）。
【单选题】We can conclude from the text that______.
A.
American cities are changing far the worse
B.
people have different views on American cities
C.
many people are now moving from American cities
D.
the population is decreasing in older American cities
【单选题】From the passage we can infer that ______.
A.
Lincoln was born in February
B.
the American people love Washington because he was honest
C.
Washington was buried near the capital
D.
cherry pie is a necessity for Washington's birthday
【单选题】设全集 U={a,b,c,d},集合A={a,c},B={b,c}, 则C U B∪A为 ( )
A.
{a,c,d}
B.
{a，b，d}
C.
{a，b，c}
D.
{b，c，d}
【简答题】设全集U={a，b，c，d，e}，集合A={a，b}，B={b，c，d}，则A∩C U B=______．
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