将区带电泳与免疫沉淀反应结合起来的技术为
A.醋酸纤维薄膜电泳B.琼脂糖凝胶电泳C.免疫固定电泳D.等电聚集电泳E.SDS-PAGE
参考答案:C
Mary rushed home_______ she heard the news, only______ that her husband was gone.
A.as soon as; finding
B.immediately; to find
C.the moment; find
D.when; found
1912-1919年的历史事实证明,阻碍中国民族资本主义发展的根本因素是( )
A.封建专制主义的压制
B.帝国主义的侵略
C.自然经济的束缚
D.国民素质的低下