单项选择题
水体中DO浓度实测值小于水功能区标准浓度限值,下列DO的标准指数值中,在实际评价时可能出现的有( )。A.-...
单项选择题水体中DO浓度实测值小于水功能区标准浓度限值,下列DO的标准指数值中,在实际评价时可能出现的有( )。
There was a fierce competition for the ___ resources. A...
单项选择题There was a fierce competition for the ___ resources. A、scarce B、enough C、well D、plenty
I lost all my _____ at Heathrow Airport. A、baggage B、lu...
多项选择题I lost all my _____ at Heathrow Airport. A、baggage B、luggage C、bag D、bags