用ELISA双抗体夹心法检测抗原A时，固相载体的包被物是
B
暂无解析
Mrs. White has _____ that she is not able to get a job.
I____come yesterday ,but I could not.
Nora: How long has this bookshop been in business?
Michel: ______1982.
She heard a terrible noise,____ brought her heart into her mouth.
Dr. Yang worked ______ three days ago.
Most of the people in the group felt rather disappointed at their travelling abroad.They say that it _______better organized.
Louise: Will 100 dollars be enough?
Jack: Another 50 ______.
This price is ____ of your 5% commission.
How I _____ I could live on the moon.
Which director is given the opening speech at the Annual General Meeting?