When oil is accidentally discharged into the water，what should you do after reporting the discharge（）.

A.Contain the oil and remove as much of it as possible from the water

B.Throw chemical agents on the water to disperse the oil

C.Throw sand on the water to sink the oil

D.Obtain your permit from the Corps of Engineers

南宋建炎二年，为阻止金兵南下，东京留守杜充在滑州以西决开黄河堤防，造成黄河河道的又一次大变动，开启了黄河七百多年（）的历史。

A、东流

B、南流

C、西流

D、北流