单项选择题

A．Disadvantages of tall buildings.
B．Modern elevators.
C．The Crystal Palace Exhibition.
D．The invention of the elevator.
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单项选择题
A．European expeditions in the 1700s.B．The growth of Los Angeles.C．Famous sites in Los Angeles.D．The entertainment industry.
A．European expeditions in the 1700s.
B．The growth of Los Angeles.
C．Famous sites in Los Angeles.
D．The entertainment industry.
填空题
People benefit from stocks in obtaining two parts of return:____________.
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