单项选择题

Right now the California Air Resources Board requires that a percentage of new cars sold should be flee of emissions. What is that percentage（）

A．1%.
B．5%.
C．10%.
D．100%.

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单项选择题
In the drawing and cartoons of Uncle Sam（）

A．he wore the stars and stripes
B．be never had a beard
C．he had no hair
D．he wore a bow tie
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