—Which city has ________ population, Shunghai, Hong Kong or Qingdao?

—Shanghai, of course. [ ]

A. the smallest

B. the least

C. the most

D. the largest

吊在天花板上静止不动的电灯，受到彼此平衡的两个力是（　　）

A．电灯受到的重力和电灯对天花板的拉力

B．电灯受到的重力和电线对电灯的拉力

C．电线对电灯的拉力和电灯对电线的拉力

D．电线受到的重力和电灯对电线的拉力