Вопрос № 347263 - Английский язык

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The most convincing defense of new whole math would be evidence that it works. In a few states that have emphasized new-new math, such as Connecticut, there are early indicators of improved student performance. Critics in California, on the other hand, point to test scores in cities like Santa Barbara and Palo Alto that show at least temporary dropoffs after new math has been introduced.

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It all started in 1989, when the National Council of Teachers of Mathematics, in response to the consistently poor math scores of U.S. children, issued new standards overhauling math education. Out went the stalwarts of traditional math: the rote memorization drills, the droning chalkboard lectures. In came the cool stuff: calculators, open-ended problems, exercises that encourage kids to discover their own route to the right answer.

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Speakers of European languages expect that their verbs will always tell them something about time, that there will be a relation between tense and time, and that we shall have at least a future, a present and a past tense referring to a future, a present and a past time. But there is no natural law that says that a verb in any language shall be concerned with time. Indeed there are plenty of languages in which time relations are not marked at all and there are some languages which are concerned with spatial rather than temporal relations. Even in languages where time seems to be dealt with in the verb it is not always a simple matter of present, past and future.

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English does not handle present, past and future as a trio in the category of tense; we shall not be referring to future tense at all in spite of having past and present tenses. In English the verb may indicate that an action took place in a period preceding, but continuing right up to, the present moment, as well as simply in the past. In other languages such as Slavonic languages, what is important is whether or not the action has been completed. “I read a book last night” will be translated into Russian in two different ways - depending upon whether or not I finished the book.

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It’s difficult to speak about music in general, because it will either take a lot of time or just one sentence to explain our attitude. Music is an integral part of our life. It is varied because it reflects different human emotions. If we ask several people what kind of music they like, all of them will give different answers. Tastes differ. But the world of music is boundless and everybody can find there something that satisfies his tastes and demands. And all the people will agree that our world will be dull without music.

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The triode, or three electrode tube, is an elaboration of the diode.
The diode consists of two electrodes. They also appear in the triode and they constitute the basis of the triode. In the triode the third electrode (the control grid) is added in the space between the emmitter and the plate.
The control grid is a metal structure which may be of different shape, depending upon the design of the tube.
The basic function of the triode is to amplify the current, or voltage or electric power. In this process of amplification the control grid plays a most important role.