4 complete the sentences with the correct past form of the appropriate verb.
1 f scott fitzgerald met zelda sayer while he was training with the us army. (train / meet)
2
her first novel in 2003. it two years later. (publish / write)
3 after
,
the problem very quickly. (forget / quarrel)
4 when
her dead husband,
suicide. (commit / see)
5 in love with my wife instantly when i her at a party. (fall/ see)
6 the suggestion that _ earlier. (make / reject)
5 correct the mistake in the sentences. tick the three correct sentences.
1 when i was just a little boy, i was asking my father: "what will i be? ' asked
2 a lot of things happened when they met for the first
3 last week i used to visit my
4 i used to have long hair as a child. i haven't got much hair these
5 the prince banished romeo from the city after he'd heard of the
6 i wasn't paid attention when you explained the plan for
7 it was already 10 a.m. when i was waking
8 after the storm was destroying it, the place looked
9 last saturday i had gone cycling with my
10 he was wearing a white jacket when i had seen him last
11 vivaldi's concertos had become more popular after he
In our city there are many streets, boulevards, avenues, many of which are named after prominent figures of the past or present. Agree, because sometimes it happens that we pass by, work or even live on a street named after such a person, but sometimes we know absolutely nothing about him, his life and activities, and why this street or Avenue was named after this person.
To know about the people whose names the streets of the city are named after means to remember those who glorified our city, region, our country, and therefore means: to know the history and culture of your region, your homeland.
This page of the site contains information about those people whose names are the streets of Kemerovo. These are people who have done a lot not only for our city, but for the whole of Russia. These are participants in wars, statesmen, military leaders, doctors, scientists, business leaders and many others whose courage, intelligence, dedication and work have made them an example for new generations of people.
Перевод:
В нашем городе есть множество улиц, бульваров, проспектов, многие из которых названы в честь видных деятелей или современности. Согласитесь, ведь иногда бывает, что мы проходим мимо, работаем или даже живем на улице, названной в честь, такого человека, но, порой, совершенно ничего не знаем о нем, его жизни и деятельности, и почему именно в честь этого человека была названа эта улица или проспект.
Знать о людях, именами которых названы улицы города, значит помнить тех, кто прославил наш город, область, нашу страну, и потому означает: знать историю, культуру своего края, своей Родины.
На этой странице сайта собрана информация о тех людях, чьи имена носят улицы города Кемерово. Это люди, которые сделали много не только для нашего города, но и для всей России. Это участники войн, государственные деятели, полководцы, врачи, ученые, руководители предприятий и многие другие, чье мужество, ум, самоотдача и труд сделали их примером для новых поколений людей.
Plastics are non-metallic, synthetic, carbon-based materials. They can be moulded, shaped, or extruded into flexible sheets, films, or fibres. Plastics are synthetic polymers. Polymers consist of long-chain molecules made of large numbers of identical small molecules (monomers). The chemical nature of a plastic is defined by the monomer (repeating unit) that makes up the chain of the polymer. Polyethene is a polyolefin; its monomer unit is ethene (formerly called ethylene). Other categories are acrylics (such as polymethylmethacrylate), styrenes (such as polystyrene), vinys (such as polyvinyl chloride (PVC)), polyesters, polyurethanes, polyamides (such as nylons), polyethers, acetals, phenolics, cellulosics, and amino resins. The molecules can be either natural — like cellulose, wax, and natural rubber — or synthetic — in polyethene and nylon. In co-polymers, more than one monomer is used.The giant molecules of which polymers consist may be linear, branched, or cross-linked, depending on the plastic. Linear and branched molecules are thermoplastic (soften when heated), whereas cross-linked molecules are thermosetting (harden when heated).Most plastics are synthesized from organic chemicals or from natural gas or coal. Plastics are light-weight compared to metals and are good electrical insulators. The best insulators now are epoxy resins and teflon. Teflon or polytetrafluoroethene (PTFE) was first made in 1938 and was produced commercially in 1950.Plastics can be classified into several broad types.1. Thermoplastics soften on heating, then harden again when cooled. Thermoplastic molecules are also coiled and because of this they are flexible and easily stretched.Typical example of thermoplastics is polystyrene. Polystyrene resins are characterized by high resistance to chemical and mechanical stresses at low temperatures and by very low absorption of water. These properties make the polystyrenes especially suitable for radio-frequency insulation and for parts used at low temperatures in refrigerators and in airplanes. PET (polyethene terephthalate) is a transparent thermoplastic used for soft-drinks bottles. Thermoplastics are also viscoelastic, that is, they flow (creep) under stress. Examples are polythene, polystyrene andPVC.2. Thermosetting plastics (thermosets) do not soften when heated, and with strong heating they decompose. In most thermosets final cross-linking, which fixes the molecules, takes place after the plastic has already been formed.Thermosetting plastics have a higher density than thermoplastics. They are less flexible, more difficult to stretch, and are less subjected to creep. Examples of thermosetting plastics include urea-formaldehyde or polyurethane and epoxy resins, most polyesters, and phenolic polymers such as phenol-formaldehyde resin.3. Elastomers are similar to thermoplastics but have sufficient cross-linking between molecules to prevent stretching and creep.
Объяснение: