Предмет: Физика, автор: evgenyvr

Носители заряда в электролит ах?

peles2003: 我很好

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Автор ответа: larisaorlova65

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Носители заряда в электролитах - ионы ( положительные и отрицательные)

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ПОМОГИТЕ ПОЖАЛУЙСТА
1.Read and say: true, false or not stated.
Litter is garbage – like food, paper and cans – on the ground or in the street. Where many people live together, litter is a problem. People don’t always put their garbage in the bins. It’s easier to drop a paper than to find a bin for it. But litter is ugly. It makes the city look dirty, and it spoils the view.
The wind blows papers far away. Often they are difficult to catch. When they blow against a fence, they stay there. This fence is a wall of garbage.
Litter is a health problem, too. Food and garbage attract animals, which sometimes carry disease.
Some people want to control litter. They never throw litter themselves, and sometimes they work together in groups to clean up the city. In most places litter is against the law. The law punishes people who throw garbage in the streets. They usually pay a fine, and occasionally they go to jail.
Two famous sayings in the United States are: “Don’t be a litterbug!” and “Every litter bit hurts!”
1) Litter is a problem among people.
a) true b) false c) not stated
2) Garbage makes our cities look awful.
a) true b) false c) not stated
3) There are special bins for different garbage in the streets.
a) true b) false c) not stated
4) Papers are easy to catch.
a) true b) false c) not stated
5) Garbage attracts sick animals.
a) true b) false c) not stated
6) People don’t care about litter.
a) true b) false c) not stated
7) Groups that cleans litter are in every city.
a) true b) false c) not stated
8) There are no antipollution laws.
a) true b) false c) not stated
9) In some countries people are punished for dropping litter.
a) true b) false c) not stated
10) The saying “Don’t be a litterbug!” asks you not to drop litter in the streets.
a) true b) false c) not stated
2. Choose the word with the same or similar meaning.
Example: to destroyto kill b) to break c) to fight
1)a disaster a)danger b) trouble c) to trouble
2) misty a)stormy b) foggy c) rainy
3) to damage a) to be out of luck b) to hurt c) to be in trouble
3. Choose the right variant.
1. Environment / environmental
1) They have many ... problems in their city.
2) To protect the ....is our main task nowadays.

2. Protection / protective / protect1) We must ....our Earth.
2) He wears ....clothing as he is a fireman.
3). .... of nature is very important.
3. Pollute / polluted / pollution
1) The air is .....by gases in the city.
2) People ....the ground throwing away litter.
3) What do you know about the ....of rivers and seas?
4. Choose the word which best completes the sentence.
A modern spaceship was … 3 days ago.
taken b) flown c) launchedWhere is she doing her research … this serious problem?
of b) on c) inThe hurricane did a lot of … to the town.
damage b) disasters c) problemsThe famous actor was shaking … laugh.
а) with b) from c) to
Choose the correct answer.
He … at the table the whole evening yesterday.
was sitting b) sit c) sat
I … my homework the whole evening yesterday.
did b) were doing c) was doing
He ….his work by that time.
finished b) was finishing c) had finished
… Australia is the smallest continent in the world.
- b) a c) the… UK is one of the world’s smallest country.
- b) a c) theMy parents make me … work hard at school.
to b) –
5. Choose the words which are always used with “the”:
1) Europe 2) Spain 3)USA 4)Urals 5)Bermuda 6)British Isles 7)Moscow 8)Volga 9) Black Sea 10) Baikal
6. Translate:
protective clothes d)throw away
chemical waste e)recycled paper
air pollution

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