单项选择题

A．A college campus.
B．A beautiful park.
C．An art museum.
D．An old building.
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单项选择题
what changes did the reinforced concrete bring to the architecture industry
A．It made the buildings solid and fireproof.
B．It decreased workers’ labor intensity.
C．It shortened the construction period.
D．It beautified the outlook of the buildings.
单项选择题
When are professional basketball games in the US played indoors
A．During the summer months.
B．During the spring months.
C．During the winter months.
D．During the autumn months.
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