以醋酸纤维素薄膜作支持物进行血清蛋白质电泳的缓冲液常用PH值为
A．3.5
B．5.5
C．6.5
D．7.5
E．8.6
参考答案：E
He was not really in the mood for anything ______ it dawned on him that it had not been his fault.
A．since
B．when
C．after
D．until
简述社会监理的依据。
