Everyone needs friends. Friends bring us happiness and hope in our lives. But the ability to make friends changes from person to person. To some people, making friends is easy, and to others it's very difficult.
    Making friends is a skill, and the first thing is to know how to get on with others. If you have trouble in making friends, maybe I can tell you how to do it.
    Realize your own good points. You have skills and talents(才能) that others will like.
    Believe that you are a good person and have something nice to share with others.
    Be humourous. Learn to laugh at yourself and your weakness. Remember to smile at others.
    Respect(尊敬) the others. Everyone has his own idea. Learn how to listen to others; ideas without trying to make them accept(接受) yours.
    Be kind. If you are kind to others, they will usually be kind to you. There are hundreds of little things you can do to show your kindness. Open the door for someone. Wave to a friend and so on.
    Don't complain(抱怨). Learn to accept what you can't change, and work hard to change what you can. No one is willing to hear your complaints all the time.
    Never give up. Even if you are faced with some closed-minded people, never give up. And try to find someone who will understand you.

可在同一细胞中产生的生命现象或物质是 （   ）

 人们生活中的衣、食、住、行均与化学有着密切的联系．

（1）蛋白质是构成人体细胞的基础物质．下列食品中富含蛋白质的是____ （填标号）．

A．鱼肉      B．牛奶      C．猪油      D．蔬菜

（2）有一种面料叫“冰蚕丝”的衣服，其主要成分为合成纤维．用化学方法鉴别“冰蚕丝”和天然蚕丝：____．

（3）甲醛（CH₂O）是一种____（选填“有机物”或“无机物”），有剧毒且能致癌．用含有甲醛的材料装修房子，人进入后会闻到特殊气味，这主要与甲醛分子____有密切关系，因此新装修的房子最好通风透气一段时间后才入住．

（4）无人驾驶汽车处理系统的核心材料是高纯度的硅．工业制硅的反应之一如下：2X+SiCl_4​Si+4HCl．该反应中，X的化学式是____ ．

选出你所听到的句子（  ）

将表面涂上红色的正方体等分成若干个相等的小正方体，观察发现，至少被两面涂色的小正方体有188个，则没有被涂色的小正方体有____ 块．