— How about the suggestion Prof. Smith put forward at the meeting last Friday?

— The committee discussed it for hours without a decision _______.

A．taking

B．to take

C．being taken

D．taken

慢性肾衰竭长期低优质蛋白质饮食还需补充的是（）

A.球蛋白

B.白蛋白

C.高密度脂蛋白

D.低密度脂蛋白

E.必需氨基酸