单项选择题

John Hancock Center is an experiment in engineering in terms of using （） for the first.

A.exoskeleton
B.tower crane
C.structural steel
D.glass wall

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单项选择题

Which of the following building used tower crane for the first time?（）

A.John Hancock Center
B.Chrysler Building
C.The Empire State Building
D.Marina City

多项选择题

What are the features of a Victorian Brownstone house in Boston?（）

A.It has a stoop.
B.The facade is built with brownstone or brown-colored bricks.
C.It’s often a 2 or 3-story townhouse.
D.The facade is built with brownstone only.

单项选择题

If you husband something valuable, you use it （）。

A.Carelessly
B.Optionally
C.Carefully
D.Freely