单项选择题

著名的“六项扣除”理论是由下列哪位思想家提出

A．恩格斯
B．马克思
C．贝蓓尔
D．伯恩斯坦

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多项选择题

We can say that international law is a law of coordination because international law is: .
A、created by its own subjects
B、applied it by its own subjects
C、derived from a legal supervisor purpose
D、a legal system made by own its subjects to bind themselves.

多项选择题

打浆的主要作用包括_____
A、细胞壁的位移和变形
B、纤维润胀
C、产生纤维碎片
D、外部细纤维化和内部细纤维