答案:D
—I thought you ______ for vacation tomorrow.
—I had planned to, but I have a very important meeting to attend tomorrow.
A.will leave
B.are leaving
C.have left
D.were leaving
渤海海域主要开发油气田的地层水为()水型。
A、硫酸钠
B、氯化镁
C、重碳酸钠
D、不确定