There are lots of rules at Selina's school.
She agrees with some1them. For example, they can't arrive2 , they can't  run in the hallways, and they can't eat in class. All3 rules are okay because they're reasonable(合情合理的).
But there are some rules Selina4agree with. For example, at her school they have to wear a uniform and they can't wear jeans. But she thinks jeans are5because they're comfortable. In school, they can't listen to music in art class. Selina doesn't agree with this rule. She thinks 6 music in art crass is okay.
Selina7 has to follow some rules at home. For example,8she wants towatch TV, she has to finish her homework first. And she can't go out with her friends 9school nights, that is, from Monday to Friday, she also has to clean her room10week. Luckily, she doesn't have to take out the trash（垃圾）. She hates it.

已知且，函数，当时，均有，则实数的取值范围是

如图，小方格的面积是1，则图中以格点为端点且长度为5的线段有（   ）

一枚质地均匀的骰子的6个面上分别刻有1〜6的点数，抛掷这枚骰子1次，向上一面的点数是4的概率是____．

甲醇的化学式为CH₄O，某甲醇溶液中甲醇所含氢原子数与水所含的氢原子数相等，则该溶液中溶质的质量分数是 (　　)