火箭免疫电泳的火箭峰基底过宽()
A．琼脂凝胶的电渗过大
B．抗原为IgG类蛋白质
C．抗原含量过高
D．电泳时间未达终点
E．加样速度慢
参考答案：E
——How is it that you know she’s got back from the UK?
——She ____ when I came out of the house this morning.
A．seemed to be passing
B．happened to have passed
C．chanced to be passing
D．chose to be passing
晶胞原子数
