根据资产归属及供电方式，用户可以分为（）用户四类。
参考答案：公用用户、专用用户、专线用户和双电源
有甲、乙两辆汽车，甲两小时可跑240千米，乙六小时可跑660千米，哪辆车跑得快些？
The number of the tigers is getting ________. If we don’t help them, they will disappear ______a few years
A．fewer and fewer, in
B．larger and larger, after
C．more and more, after
D．smaller and smaller, in
