水田土壤的适耕期一般选择在土壤含水量()
A.低于塑性下限
B.高于塑性上限
C.低于塑性上限
D.高于塑性下限
参考答案:B
一个正多面体有六个面,则该多面体有______条棱.
Daniel doesn’t like to argue ___ others ____ this problem.
A to;with B with;about C with;for D for;about