试题与答案

如果第一次从1~4四个整数中任取出一个数,作为点P(m,n)的横坐标,第二次再从

题型:解答题

题目:

如果第一次从1~4四个整数中任取出一个数,作为点P(m,n)的横坐标,第二次再从1~4四个整数中任取出一个数作为P(m,n)的纵坐标,得到点P(m,n).
(1)试用列表或画树状图的方法列举出所有点P(m,n)的情形;
(2)求出点P(m,n)在反比例函y=
4
x
数的图象上的概率.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, E解析:闭式自动喷水灭火系统按照系统的用途和组件配置,通常分为湿式系统、干式系统和预作用系统。

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