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between these two major categories is a class of materials called semiconductors. as the name implies, a semiconductor is a material with conductivity roughly midway between conductors and insulators. it is not just a poor conductor; it has two important properties. first, its resistance normally decreases with increase of temperature, while in conductors resistance slightly increases with temperature. second, the flow of current in a semiconductor may be caused either by a flow of negative electrons or by a movement of missing sites in the opposite direction. if an atom has one outer electron missing, a loosely bound electron from a neighbouring atom can jump into it, leaving behind a new vacant site; this, in turn, can be filled by an electron from the third atom and so on. the impression is as if the vacant site has moved. such vacant sites are called “holes” and since a negative electron is missing, the hole can be said to have a positive charge.

Так и должно быть

Объяснение:

На самом деле, они и сами до конца не в курсе про конкретные причины. Здесь больше традиции, чем грамматики.

По поводу местоимения "я", то до 13 века у них было ich (ic) (как в немецком) для "я", и оно склонялось как "я" склоняется у нас в языке до сих пор (и не только у нас) . Потом в тексте стало появляться i наравне с ic - потом оно перестало склоняться, и предположительно для того, чтобы i не потерялось в тексте, особенно написанном от руки, стали выделять заглавной буквой.

А месяцы пишутся с большой буквы, т. к. месяц - это имя собственное - названия месяцев и дней недели давались по именам богов и знаменитых людей

galina572319

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1 Kostas asked me if I'd ever been to Athens.

2 I would never have realized it was Thomas you'd told me about.

3 You haven't really enjoyed much this holiday.

4 *Are there any biscuits in the cupboard?' 'No, there are not.

5 Pizza which is popular all over the world originally came from Italy.

6 My sister might still get the job in London - we won't know until next week.

7 Dan drinks coffee, doesn't he?

8 Edinburgh is the city where the Harry Potter novels were written.

9 Wait until Dave arrives, and then we can all go together.

10 Oh, no! That's the man whose car I crashed into last month!