他们本着保证质量,降低成本、便于服务为原则,改革了处方、工艺和剂型。
参考答案:他们本着保证质量,降低成本、便于服务的原则,改进了处方、工艺和剂型。
In my opinion,it doesn't make any________to buy vegetables from 100 miles away when you can buy
the same seasonal produce grown right here.[ ]
A. impression
B. sense
C. progress
D. effort
甲醛肟分光光度法测定水中锰时,将显色液倒入50mm比色皿中,于()nm波长处,以()为参比测量吸光度,并做空白校正。