环境中易引起持续性蓄积危害的污染物不包括（）。

A.DDT、PCBs等

B.氰化物

C.汞

D.镉

E.铅

The war was over about three months ago, ______ the American soldiers in Iraq are still having a lot of

trouble to deal with.[ ]

A. or

B. and

C. but

D. so