ELISA常用的固相材料为
A.NC膜B.聚苯乙烯C.磁性颗粒D.尼龙膜E.凝胶
参考答案:B
解析:聚苯乙烯可塑性好,透光性能强,能较好吸附蛋白质抗原或抗体。
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He made the choice to give all his money away, ______, he said, brought him happiness.
A.it
B.that
C.which
D.this
以下用作温度测量的是()
A.毕托管
B.倾斜微压计
C.热电偶
D.转子流量计