检测NK细胞不能采用的实验方法是（）
A.酶联免疫斑点实验
B.酶释法
C.放射性核素法
D.荧光分析法
E.电泳分析
参考答案：E
If you ______ the chat room ten minutes ago, you _______ what we were talking about.
A．have joined ; will know
B．had joined ; would have known
C．should join ; would know
D．would join ; have known
罗伯逊易位
