A.less than 100 parts per million B.more than 100 parts per million C.at least 100 parts per million D.100 parts per million
A.Inerted B.Crude oil washed C.Gas freed D.Battened down
A.less than 12 nautical miles from PRC B.less than 12 nautical miles from nearest land C.in the navigable waters of the PRC D.less than 25 nautical miles from nearest land