小明在水中看岸上的小鸟，图中，能正确表示其光线传播大致路径的是[ ]
A.
B.
C.
D.
C
分馏塔塔板结盐处理要点是（）。
A、加大进料量冲刷
B、提塔底温度
C、提进料温度
D、停工水洗
翻译下面的句子(Translate the sentences19-21)
19.Buses numbered 1 to 100 are limited to travel within the city centre. _____________________________________________________________________
20. Los Angeles, which was built with the motor car in mind , and is famous for its six –lane highways ,is now the USA’s most congested city.
_____________________________________________________________
21. A survey carried out at the end of 2003 suggests it does.
_______________________________________________________________________
