Turn left at ______ traffic lights, you'll see ____ library in ____ front of you.[ ]

A. the; the; a    

B. the;/;the

C. a;the;/          

D. the;the;/

与城市空气SO2污染的危害有关的是

A．硝酸盐
B．光化学烟雾
C．汞的甲基化
D．酸雨
E．水体富营养化