国际单位制有（）个基本单位。
A.2
B.4
C.7
D.10
参考答案：C
如图所示，从倾角为θ的斜面上的A点以速度v0平抛一个小球，小球落在斜面上的B点，则小球从A到B的运动时间为___________。
Innovative approaches to manufacturing, coupled with the tremendous size of the domestic market, led to the emergence of the United States as an industrial giant.
A．followed by
B．deriving from
C．combined with
D．mixed with
