综合作用假说认为，（）是完成煤与瓦斯突出过程的主要因素，是抛出煤体并进一步破碎煤体的主要动力。
A、地压
B、瓦斯
C、煤的物理力学性质
参考答案：B
32. The man had expected to see all his relatives when in hospital, but _______ came to see him while many of his friends offered him their help.
A．none
B．no one
C．someone
D．Anyone
由腹膜构成的韧带是（）。
A.静脉韧带
B.肝圆韧带
C.子宫圆韧带
D.子宫主韧带
E.肝十二指肠韧带
