每次ELISA.测定后,能判断本次实验正常的较全面因素是:()
A.阴阳性合符要求
B.空白孔无色
C.弱阳性质控品OD≥C.O(夹心法)
D.以上三项
参考答案:D
It's ten o'clock. I must go ______. [ ]
A. to home
B. home
C. my home
D. his home
国家质检总局对进口()实行检疫审批制度。
A.粮食
B.苗木
C.水果
D.烟叶