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
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?()