중3 지학 민찬규 3과 본문 변형문제

From ____ birds to self-cleaning plants, the way nature works fascinates us.

Some people not only use nature but also imitate it ____ find solutions to their problems.

Leonardo da Vinci (1452-1519) was one ____ person.

He wondered ____ birds could fly.

He closely watched birds, ____ notes, and drew pictures of them.

Even though his invention was not successful, he imitated a bird’s wings to try to make a ____ machine.

Since then, more and more people have successfully ____ the surprising abilities of nature’s genius.

Let’s explore some ____ them.

The ____ train was first made in Japan.

But ____ had one problem.

When the train entered a tunnel, the sudden increase ____ air pressure created a very loud sound.

It often woke people up and caused ____

A team of engineers tried to solve the problem, but they didn’t know how they could reduce the ____

One day, one of the engineers was watching a bird in search of ____ meal.

He saw the bird quickly and ____ diving into the water.

He wondered how ____ bird entered the water so gracefully.

So, he studied more about ____ bird and discovered its long, narrow beak.

He redesigned the front ____ the train by imitating the bird’s beak.

____ was successful.

Now the new train travels not only more quietly but ____ 10% faster with 15% less electricity.

One ____ a Swiss engineer, George de Mestral, was hiking in the woods with his dog.

On his way home, he saw ____ burrs were stuck to his clothes and his dog’s hair.

He wanted to know how that ____

He ____ a closer look at the burrs and noticed that the ends of the burr needles were not straight.

He wondered ____ he could apply that to make something useful.

After ____ lot of testing, he finally invented two new materials.

One had many tiny needles like those of burrs and the other had ____ hairy surface.

When they were pressed together, ____ became a very good fastener.

It ____ not only strong but also easy to use.

Since then, many people have used his invention in ____ different ways.

It is often ____ for clothing, shoes, and bags.

Some people use it to play a number of ____ games.

In space, it keeps things ____ floating away.

____ is nothing useless in nature.

We just have to become curious and ask ____