物料在干燥过程中能除去的水分
A.自由水B.结合水C.平衡水D.非结合水E.结晶水
参考答案:A
—They didn’t go to the park yesterday
--- ________.
A.So did we
B.So we did
C.Neither did we
D.Neither we did
21世纪经济林生产发展方向是什么?