I want a large,________ box that won't break easily to contain some useful things.

A．genuine

B．solid

C．violent

D．slight

骨质软化症的病理基础是（）

A.骨有机成分减少

B.骨有机成分增加

C.骨有机成分正常，钙盐减少

D.骨有机成分和钙盐均增加

E.骨有机成分和钙盐均减少