Вопрос школьника по предмету Английский язык
. Put the verbs in brackets into the correct tense form. 1). – Where ___________________ (to be) Bob? – He __________________________ (to have) breakfast in the kitchen. 2). They __________________________ (to win) two Cup Finals in the previous two years. They _____________________________ (to win) today, too. 3). I ________ already ______________ (to order) pizza at the local cafe. 4). — Excuse me, can you help me? I __________________________________(to look ) for the library. 5). We ___________________(to be) tired yesterday. We______________________ (to work) in the garden. 6). Betty and Becky ____________________________ (to visit) their relatives in London next summer.
Ответ учителя по предмету Английский язык
Ответ:
1). – Where is Bob? – He is having breakfast in the kitchen.
2). They won two Cup Finals in the previous two years. They will win today, too.
3). I have already ordered pizza at the local cafe.
4). — Excuse me, can you help me? I am looking for the library.
5). We were tired yesterday. We were working in the garden.
6). Betty and Becky will visit their relatives in London next summer.
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acid rains
Every year more and more plants and animals disappear never to be seen
again. Strangely, it is the most intelligent but most thoughtless animal that is
causing most of the problems — man. Nature is very carefully balanced and if
this balance is disturbed, animals can disappear alarmingly fast. Every day,
thousands of species of animals draw closer to extinction. There are countless
number of species which may become extinct before they are even discovered.
In many lakes the fish are dying. Fishermen are worried because every year there
are fewer fish and some lakes have no fish at all. Scientists are beginning to get
worried too. What is killing the fish?
The problem is acid rain. Acid rain is a kind of air pollution. It is caused by
factories that burn coal or oil or gas. These factories send smoke high into the
air. The wind often carries the smoke far from the factories. Some of the
harmful substances in the smoke may come down with the rain hundreds of
miles away.
The rain in many places isn’t natural and clean any more. It’s full of acid
chemicals. When it falls in lakes, it changes them too. The lakes become more
acidic. Acid water is like vinegar or lemon juice. It hurts when it gets in your
eyes. It also kills the plants and animals that usually live in lake water. That is
why the fish are dying in lakes.
But dead fish may be just the beginning of the problem. Scientists are finding
other effects of acid rain. In some large areas trees are dying. Not just one tree
here and there, but whole forests. At first scientists couldn’t understand why.
There were no bugs or diseases in these trees. The weather was not dry. But
now they think that the rain was the cause. Acid rain is making the earth more
acidic in these areas. Some kinds of trees cannot live in the soil that is very
acidic.
Now scientists are also beginning to study the effects of acid rain on larger
animals. For example, they believe that some deer in Poland are less healthy
because of acid rain. If deer are hurt by the rain, what about people? This is the
question many people are beginning to ask. No one knows the answer yet. But
it is an important question for us all.
Уходят вдаль глубокая тропа. Снег в лесу растаял и на лесных тропинках заголубел
лёд. По сторонам тропы лежат пласты скользкой хвои растёт багульник седой ягель. Ты идёшь по лесной тропинке а ноги соскальзывают. В лесу тихо попискивают синицы пёстрый дятел шуршит мокрый ветер в зелёной хвое шумит.
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Обратная задача : После того как отрезали 7 3/4 м осталось ?м. Сколько было проволоки изначально?
1. Процесс превращения энергии магнитного поля катушки в энергию электрического поля конденсатора и наоборот в колебательном контуре называется электромагнитными колебаниями.
2. Время, в течении которого, изменяясь вектор напряженности электрического поля приобретает прежнее значение и направление, называется периодом.
3. Чем больше индуктивность катушки, тем быстрее разряжается конденсатор.
4. Величину, равную числу полных колебаний в единицу времени, называют частотой колебаний.
5. Частота колебаний измеряется в герцах.