产生下列问题的原因是

颗粒向模孔中填充不均匀
粘合剂粘性不足
硬脂酸镁用量过多
环境湿度过大或颗粒不干燥

A、裂片

B、粘冲

C、片重差异超限

D、片剂含量不均匀

E、崩解超限

He still kept work though _     _.[ ]

A. to be ill    

B. ill    

C. he is ill    

D. he was ill