Question

【题目】 Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction. Friction happens when two things that aren't very smooth rub together to make heat energy. The faster you rub two things together, the more friction (and heat) you can make. Let's discover friction!

WHAT YOU'LL NEED:

● Soap ● Water ● Your hands!

WHAT TO DO:

①Make sure your hands are dirty.

②Rub your hands together until you feel the heat of your hands.

③Now, use soap and water to get your hands very slippery(滑的).

④Try to make friction happen while your hands are slippery.

⑤Please write down what has happened.

LET'S TALK!

Friction is an energy that happens when two things tub together. When friction happens, it makes heat! When your hands are slippery, they won't make very much friction and your hands won't get so hot.

DID YOU KNOW?

● Friction happens when you stop your fast running bike.

● Ancient people made fires by rubbing two pieces of wood together. Friction happened though they didn't know it.

Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not hot, touch the tires(轮胎) of the car before and after a short drive to see how much warmer they get from friction.

【1】This text is most probably .

A.a science reportB.a car advertisement

C.a rubbing introductionD.a chemistry programme

【2】You'd better make your hands to get heat when you rub them.

A.slipperyB.dryC.wetD.smooth

【3】What does the word "friction" in this text mean in Chinese?

A.摩擦B.冷却C.膨胀D.震动

【4】 is not an example of friction.

A.Bike ridingB.Car driving

C.Hands rubbingD.Friction discovering

【5】What's the last column(栏目)?

A.THINK IT OVER!B.WHAT HAPPENED?

C.EVERYDAY ACTIOND.WORK WITH PARENTS

Answer 1

【答案】

【1】A

【2】B

【3】A

【4】D

【5】D

【解析】

本文主要介绍有关摩擦的一些知识。摩擦是无处不在的。只不过看你是否注意到了它。

【1】推理判断题。根据“Let's discover friction!”可知，我们要探索摩擦，因此本文可能是一篇科学报道，故选A。

【2】细节理解题。根据“①Make sure your hands are dirty.②Rub your hands together until you feel the heat of your hands.”可知，在摩擦双手之前，先把手弄干，故选B。

【3】词义猜测题。根据“Friction happens when two things that aren't very smooth rub together to make heat energy.”可知，当两个不太光滑的物体摩擦产生热能，因此这是表示摩擦。故选A。

【4】推理判断题。根据“When your hands are slippery, they won't make very much friction and your hands won't get so hot.”可知，摩擦手会产生摩擦力；根据“Friction happens when you stop your fast running bike.”可知，骑自行车会产生摩擦力；根据“If it is not hot, touch the tires(轮胎) of the car before and after a short drive to see how much warmer they get from friction.”可知，开汽车会产生摩擦力。因此摩擦的发现是不会产生摩擦力的。故选D。

【5】推理判断题。根据“If not, ask your parents to take you out in a car”, 可推知最后一个栏目是：和父母合作，故选D。

认真阅读题干，根据题干要求，在文中寻找答案所在的语句或段落，进行分析理解，词义猜测，推理判断和概括归纳，选择正确的答案。例如小题2，根据“①Make sure your hands are dirty.②Rub your hands together until you feel the heat of your hands.”可知，在摩擦双手之前，先把手弄干，故选B。