题目

His brother only thinks of himself, and he doesn't ________ others. A . decide on B . agree with C . take care D . care about 答案：D下列说法正确的是（　　）A．太阳辐射的紫外线对人身体只有害处，没有好处B．欧姆发现电流周围有磁场C．大铁块的密度一定比小铁块的密度大D．噪声是由物体振动产生的