Вопрос № 1077856 - Английский язык

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Most people describe water as a 1_______ liquid. They know that in very cold conditions it becomes a solid called 2_______, and heated on a fire becomes a vapour called steam. But water, they say, is a liquid. Now we know that water consists of molecules composed of two 3_______ of hydrogen and one atom of oxygen, which we describe by the formula H2O. This is equally true of the solid called the ice and the gas called steam. Chemically there is no difference between the gas, the liquid, and the solid, all made up of 4_______ with the formula H2O.

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In System International (SI) there are seven base units. They are the following:
- the metre (m) as the unit of length;
- the kilogram (kg) as the unit of mass;
- the second (s) as the unit of time;
- the ampere (A) as the unit of electric current;
- the kelvin (K) as the unit of (thermodynamic) temperature difference;
- the mole (mol) as the unit of substance;
- the candela (cd) as the unit of luminous intensity.
All other SI units are derived from the seven base units. They are the joule, the watt, the pascal, the newton and, most interestingly, the unit of charge, the coulomb.
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All other SI units _______.

A ________ gives a cutaway view of the joint between two panels.

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Machu Picchu
1. Set high in the Peruvian Andes, the ruins of the Inca city of Machu Picchu are among the world’s most magnetic tourist sights. Until recently reaching this mountain aerie meant a long, heart-pounding trek led by local guides. Today, globetrotting tourists arrive with nonchalant ease in air-conditioned comfort. Spanish colonialists, the collapse of high Incan culture, the elements, and natural calamities have done their best to wipe the historic architecture of Peru off the map.
2. The remote and haunting remains of Machu Picchu, however, allow us to see the great, rigid power of Inca architecture at its best and most daunting. The site of this powerful walled city, lying between two mountain peaks some 3,000 ft (900 m) above the Urubamba River, was a revered place long before the Incas began to build here with real purpose in about 1400. Inside the well-cut gray granite walls are the remains of a wide range of public buildings including palaces, baths, temples, storehouses, and burial grounds.
3. There are about 150 houses, gathered in groups around communal courtyards and aligned in terraces. The various parts of the city, on their complex series of terraces, were connected by grand stone stairs. One of the important remains found at Machu Picchu is the Intihuatana stone, used in an astronomical ritual for “tying” the sun to the earth at the midday equinox, in the perpetually vain hope of slowing its movement across the sky.
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Hurricane preparation tips for construction sites
1. Local emergency operations officials and the National Weather Service will provide hurricane landfall probabilities. Approximately 60 to 48 hours before the hurricane is expected to make landfall, consider cancelling the delivery of building materials to all job sites except any materials needed to secure the building site from storm damage. While contractors generally don't want to stop or delay construction activities, the 48- to 24-hour window before landfall is the suggested time to stop all construction activity. It's important to note that most local building departments generally stop field inspections, except for those related to pouring columns, tie beams, wet decks, floors and similar structural items, during this time as well. Contractors are encouraged to activate their hurricane job site plan during this window of time.
2. They notify subcontractors to help secure the building site. Helpful hints for site protection include: secure all job sites, giving priority attention to those located in the most populated areas; clean up all construction debris; tie or band together all loose plywood and lumber; secure other loose building supplies; remove permit board and all job site signage; locate and turn off electricity, water and gas.
3. Also, secure all portable toilets. Portable toilets can also be anchored adjacent to L-shaped walls of the home under construction and they can be weighted down with concrete blocks or sand. After the site is secure, advise subcontractors to leave and not return until the hurricane threat has passed. Make sure to have contact numbers for all subcontractors stored in a secure and dry place and that they know who will contact them after the hurricane passes.
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The Shard, London
1. The Shard is a skyscraper in the centre of London, just near the famous Tower Bridge. It is one of the tallest buildings in Europe. Designed by Renzo Piano, the tower has 88 levels and is clad entirely in glass. It contains offices, restaurants, bars, cafes, viewing galleries, a hotel and residential apartments. One of the biggest challenges the developers had to deal with was to minimise disruption in the local area. The Shard is located next to London Bridge station, one of the busiest transport hubs in London, and Guy's Hospital, a large teaching hospital. Noise and dust had to be kept to a minimum.
2. There was some special equipment used during the construction of the Shard. These cantilever loading platforms are easy to install and move. Cranes lift the platforms into position. They are flush with the floor allowing the movement of large objects in and out of the structure. High-rise buildings like the Shard need a lot of concrete. This project used a powerful, high-performance pump which can pump more than 90 m3 of concrete per hour.
3. Normally a lift shaft has to be complete before a lift can be installed. With jump lift technology this is not necessary. As the building rises, the jump lift, which contains its own machine room, rises with it. The Shard construction site used a number of cranes. The lead crane in the centre occupied the highest spot. This crane was mounted inside the core. As the building rose the crane was jacked up.
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