在平面直角坐标系中,若点P的坐标(m ,n),则点P关于原点O对称的点P’的坐标为______________.
下列估测中,最接近实际的是 【 】A.正式比赛篮球架的篮框高度约1.6m B.成人的
(2011·浙江温州八校返校联考)24.I have no ________ what is in fashion this summer.I bought this dress quite by accident. A.mind B.opinion
11.明代理学家王阳明在认识论上提出“致良知”的学说。王阳明的“良知”是指 A.人心固有的是非善恶标准 B.圣人独有的是非
I believe that my country,Poland,is a perfect example for a place where food is particularly important.When we were little children,we began to understand how much a loaf of bread meant to our parents
甲、乙、丙三位学生各自独立地解同一道题,甲做对的概率为,乙、丙做对的概率分别为,且三位学生是否做对相互独立,记为这三位学生中做对该题
定向爆破建筑物时,应同时定向切断钢筋和炸碎水泥,除用适宜的炸药外,还需用…( ) A.氧炔焰 B.铝热剂