单项选择题

A．Experimental medicines.
B．Special treatment centers.
C．Flexible working schedule.
D．Innovative physical exercises.
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单项选择题
According to 1970 figures in the U.S. men smokers are ______.
A．twice as many as women smokers
B．two times as many as women smokers
C．1.5 times as many as women smokers
D．seventeen percent less than women smokers
单项选择题
Chavan was an archeologist responsible for unearthing ancient books.
A．Y
B．N
C．NG
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