为了避免金属离子对制剂稳定性的影响,通常采用
A.选用纯度较高的原辅料
B.加抗氧剂
C.采用棕色容器保存
D.控制温度
E.通入惰性气体
参考答案:A
I can not go to the private high school.______,5000 dollars is just too much for my family to spare from living fees.
A.In other words
B.That is
C.I mean
D.Or rather
深Ⅱ°烧伤通常愈合时间为
A.1周
B.2~3天
C.2周
D.3~4周
E.5周以上