“I don't think it's my ________ that the window suddenly broke. I just opened it, that's all,” said the boy in tears.
用4N的力水平向左拉物体。用力的图示法表示这个力。
中国第八次公民科学素质调查结果显示,2010年,具备基本科学素质的公民仅占3.27%,和发达国家比,有较大差距。以下是公民科学素质调查问卷中的四个判断正误题,其中错误的是( )