题目

On September 10, 2018, Jack Ma, founder and chairman of Chinese e-commerce giant Alibaba, announced his successor (继任者) at the company he founded 19 years ago. Surprisingly, in a country where 70 to 80 percent of private companies are still family run, Mr. Ma did not name a family member. Rather, one of the world’s largest e-commerce companies will be led by Daniel Zhang, an 11-year Alibaba old hand chosen only for his “professional talent”.The history of many countries can be marked by a trend away from dependence on family succession in business, or the belief that qualities of l如图所示要使杠杆平衡，作用在A点上的力分别为F1、F2、F3，其中最小的力是（ ）A．沿竖直方向的力F1最小B．沿垂直杠杆方向的力F2最小C．沿水平方向的力F3最小D．无论什么方向用力一样大