下列关于科学家发现的说法中，不正确的是（ ）
A．沈括最早发现了磁偏角
B．安培最先发现了I=
的规律U R
C．奥斯特发现通电导体周围存在着磁场
D．法拉第首先发现了电磁感应现象
A、说法正确，沈括最早发现了磁偏角；
B、说法错误，欧姆定律是由欧姆发现的；
C、说法正确，奥斯特发现通电导体周围存在着磁场；
D、说法正确，法拉第首先发现了电磁感应现象．
故选B．
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| Last Sunday the Browns went to the park. They got home very late. Father opened the front door and they all went __1__ the house. It __2__ dark, so Mother __3__ the light. On the way __4__ their bedroom, Mother said, "__5__, John! I can hear someone in the bedroom. " They all stood __6__ outside the bedroom. They could __7__ some voice (声音) in the room. " You are right," said Father, "There're two men here. They are __8__." Then he shouted (高喊), "__9__ is there?" But no one answered. Father opened the door quickly and turned on the light. The room was empty. Then Father found something and laughed. "The radio is still on! I __10_ turn it off this morning. " Father said, "Because I forgot it." | ||||
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