影响药物制剂稳定性的因素为处方因素和环境因素。
参考答案：对
So ______ was he in his work that he didn’t notice that it was raining hard.[ ]
A. taken
B. devoted
C. absorbed
D. interesting
各熔化焊机间及焊机与墙面间的通道至少为（）m。
A、1
B、0.5
C、2
