雄黄的主成分是()
A.含水硫酸钙
B.硫化砷
C.二硫化铁
D.三氧化二砷
E.硫化汞
参考答案:B
Personally, I think it’s your attitude, rather than your score, ______ matters in your study.
A.which
B.that
C.how
D.what
药品生产企业生产工艺规程、岗位操作法和标准操作规程()
A.不得更改
B.可更改,但应由车间主任负责
C.可更改,但应由总工程师负责
D.可更改,但应报厂长同意
E.可更改,但应按制定时的程序办理修订、审批手续