行列式
Hardly had he finished his speech ________ the audience started cheering.
我国农业合作化过程中建立的初级农业生产合作社的性质是______。
The association is ________ to raising funds to help the blind.
设矩阵则A与B（）
新民主主义社会的形态是 _______。
则A与B（）