题干
— That boy enjoys drawing very much.
—____, I have never seen anyone else who is as enthusiastic about drawing as he is.
—____, I have never seen anyone else who is as enthusiastic about drawing as he is.
A：As long as I have traveled
B：Traveled so much as I have
C：As I have traveled so much
D：Much as I have traveled
答案(点此获取答案解析）
D
、倾角为
的斜面体静止在光滑水平面上，质量为
的物体从斜面体的顶端由静止释放，物体与斜面间的摩擦力不计。若要求出物体从顶端滑到下端的时间，以现有高中物理知识，求解将相当复杂，但我们可以利用表达式的单位、下滑时间的特殊值(如
、
对应的下滑时间如何)等来判断出下列哪个选项是正确的。若下滑时间为
，则下列选项正确的是：