Алюминий - самый распостраненный в земной коре металл
Впервые алюминий был получен Велером в 1827 году действием
металлического калия на хлорид алюминия. Однако, несмотря на широкую
распространенность в природе, алюминий до конца XIX века принадлежал к
числу редких металлов.
На воздухе алюминий покрывается тончайшей (0,00001 мм), но очень
плотной пленкой оксида, предохраняющей металл от дальнейшего окисления и
придающей ему матовый вид. При обработке поверхности алюминия сильными
окислителями (конц. HNO3, K2Cr2O7) или анодным окислением толщина защитной
пленки возрастает. Устойчивость алюминмя позволяет изготавливать из него
химическую аппаратуру и емкости для хранения и транспортировки азотной
кислоты.
Алюминий легко вытягивается в проволоку и прокатывается в тонкие
листы. Алюминиевая фольга (толщиной 0,005 мм) применяется в пищевой и
фармацевтической промышленности для упаковки продуктов и препаратов..
НА АНГЛИЙСКОМ
Aluminum - the most raspostranenny metal in crust For the first time aluminum was received by Voeller in 1827 effect of metal potassium on aluminum chloride. However, despite prevalence in the nature, aluminum until the end of the XIX century belonged to number of rare metals. On air aluminum becomes covered by the thinnest (0,00001 mm), but very dense film of oxide protecting metal from further oxidation and giving it an opaque look. When processing a surface of aluminum strong oxidizers (конц. HNO3, K2Cr2O7) or anode oxidation thickness of a protective film increases. Stability алюминмя allows to manufacture of it the chemical equipment and capacities for storage and transportation of nitric acid. Aluminum is easily extended in a wire and rolled in thin sheets. Aluminum foil (thickness of 0,005 mm) is applied in food and pharmaceutical industry to packing of products and preparations. вроде так
Ответ:
Answer
Объяснение:
1. All the necessary materials will be revised before the exam.
2. Graduate students study for a higher degree.
3. The undergraduate degree is obtained after 4 years of study.
4. LLM is awarded to graduate students upon completion of studies.
5. Higher educational institutions admit successful applicants.
6. Harvard University wasn’t founded in the XX century.
7. Punishments for crimes are imposed according to the rules of criminal law.
8. Recently the profession of a lawyer has become more competitive.
9. The police haven’t found the killer yet.
10. For about 10 years legislators have been discussing the bill.
11. Every year the State Duma of the RF passes a lot of laws.
12. Lawyers have come to the agreement by the end of the present session.
13. You look very thoughtful. What are you thinking about? – I am thinking about retirement. – But you are only 25. You only have just started your career. – I know, but I have read an article which says that a sensible man starts thinking about retirement at 25.
I
drive - drove - driven
fly - flew - flown
become - became - become
bring - brought - brought
forget - forgot - forgotten
II
1 - A
2 - B
3 - A
4 - C
5 - C
III
1. into
2. from
3. into
4. to
IV.
1. We enjoyed the party very much.
2. I don't like this picture very much.
3. I did a lot of housework yesterday.
1) Who put up the tent.
Steve doesn't put up the tent.