废卡上交必须坚持()的原则.
A.逐级上交
B.联社汇总
C.办事处集中处理
D.自行销毁
参考答案:A, B, C
There are ______________ in the picture.[ ]
A. some women
B. some womans
C. some womens
D. some woman
确定图示结构的超静定次数。