在化学发光免疫技术中,常用的B/F分离技术包括()
A.磁颗粒分离法
B.微粒子捕获法
C.PEG沉淀法
D.PR试剂法
E.包被珠分离法
参考答案:A, B, E
看图写话
说说图中的建筑各是什么,分别是哪个国家的?
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_____ he has made up his mind to do something, nothing will stop him. [ ]
A. Once
B. Before
C. Although
D. As soon as