自凝基托树脂固化后的平均分子量（）热凝基托树脂
A.低于
B.高于
C.等于
D.以上三者皆对
参考答案：A
急性肾衰无尿期，电解质失调后可出现（）。
A.高钾血症
B.高镁血症
C.低钠血症
D.高氯血症
E.碱中毒
I saw a woman running toward me in the dark.Before I could recognize who she was，she had run back in the direction______ she had come.
A．of which
B．by which
C．in which
D．from which
