未知题型
A,B是抛物线Y 2—8x上两点,且此抛物线的焦点段AB上,已知A,B两点的横坐标之和为l0,则 ( )A.18 B.14C.12 D.10
B本题主要考查的知识点为抛物线的性盾.【应试指导】
单项选择题 一位篮球运动员投篮两次,两投全中的概率为0.375、;两投一中的概率为0.5,则他两投全不中的概率为()
单项选择题 M: What terrible heat we are having now!W: July and August were bad enough, and I don’t think the heat will be relieved before October.Q: Which month is it now?()
单项选择题 在首项是20,公差为-3的等差数列中,绝对值最小的一项是()