Номер 2, страница 40 - гдз по английскому языку 10 класс рабочая тетрадь Комарова, Ларионова

6. What in the world ...!. Reading - номер 2, страница 40.

Условие.

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Animal	Abilities
Bat
Shark
Cat
Migratory bird

Amazing animal abilities

It is unlikely that humans will ever be able to see in the dark naturally. They will never have sonar abilities or be able to find their way from one corner of the Earth to the next without a map, a compass or a GPS. Abilities like these are unthinkable for a human, they always will be. Only fictional superheroes have these kind of abilities, or animals. In the animal world, these things are definitely possible. Some of the most ordinary animals are capable of extraordinary things. Read on to find out what they can do.

Bats

Ever heard the expression 'blind as a bat'? Bats don't have very good eyesight but they can sense obstacles (rocks, trees or other animals) better than any other animal with excellent eyesight. And they can do this perfectly in the dark! How do they manage it? Bats use sonar to find their way around. They produce a high-pitched sound that we humans can't hear! This sound bounces off the obstacles and back to their ears. In this way, bats know if the obstacle is moving, where it is exactly and where it is going to be in a few moments time. This makes it possible for the bat to easily find the small insects it likes to eat. The sonar is so precise that, in the dark, they can fly close enough to the water's surface to drink without getting wet!

Sharks

It is well known that sharks have a very strong sense of smell and that they can detect a drop of blood in a hundred litres of water. But sharks can do something more than that. Sharks have special cells in their brains that are sensitive to the electricity that other creatures produce when their muscles move. Sharks are so good at doing this that they will find a fish hidden under a lot of sand just by detecting the electric signals they give off.

Cats

Cats aren't able to see in complete darkness but they are very good at seeing in semi-darkness, like in moonlight for example. Humans can hardly see a thing in such dim light. How do cats do it? It is the structure and size of their eyes that makes it possible. Cats' eyes are very large for the size of their heads. They also open very wide and let in a huge amount of light. As well as being large, the eyes contain a membrane at the back that acts as a mirror. This membrane reflects light after it has already entered the eye so that it increases the amount of light available. This allows cats to have excellent night vision, which explains why they are so active after dark.

Migratory birds

When humans want to find their way, they have to rely on familiar landmarks (natural features or buildings, for example) or the sun to work out which way is north. But birds can travel thousands of kilometres and instinctively find their way by using the Earth's magnetic field. Scientists are still not sure how they do it exactly, but there is one theory that says that birds have something called synaesthesia, which lets them 'see' the planet's magnetic lines. Superman wasn't even capable of doing that!

Решение.