题干

学习化学知识后,观察物质世界就要从化学视角看.下列对打火机主要燃料丁烷(C4H10)的看法不正确的是(   )

A:从组成上看:丁烷由碳、氢两种元素组成

B:从结构上看:一个丁烷分子由4个碳原子、10个氢原子构成

C:从变化上看:丁烷完全燃烧只生成水

D:从性质上看:丁烷具有可燃性

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C

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    Life is kind of like a party. You invite a lot of people, some leave early, some stay all night, some laugh with you, some laugh at you, and some show up really late. But in the end, after the fun, there are a few who stay to help you clean up the mess. And most of the time, they aren't even the ones who made the mess____ They are the ones who matter most. Here are four things real friends do differently:

    They face problems together. A real friend is someone who sees the pain in your eyes while everyone else still believes the smile on your face.____Just look for someone who will face them with you.

    ____Your word means everything. If you say you're going to do something, DO IT! If you say you're going to be somewhere, BE THERE! If you say you feel something, MEAN IT! If you can't, won't, and don't, then DON'T LIE. Real friends keep promises and tell the truth upfront.

    They accept each other. Trying to change a person never works. A real friend is someone who truly knows you and loves you just the same.____ Be yourself and people will love the real you. If you feel like changing something about your friend, ask yourself what change you can make in yourself instead.

    They support each other's growth changes. Our needs change with time. When someone says, “You've changed,” it's not always a bad thing.____Don't apologize for it. Instead, be open and sincere, explain how you feel, and keep doing what you know in your heart is right,

A. They keep their promises.

B. No one is happy all the time.

C. They make time for each other.

D. Don't change so that people will like you.

E. Sometimes it just means you've grown.

F. These people are your real friends in life.

G. Don't look for someone who will solve all your problems.