Расположите пропущенные предложения в таком порядке чтобы получился связный текст 1 _______. A coral...: ответ на тест 605289 - Английский язык

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст
1 _______. A coral attaches itself to a rock or sand. At the top of the polyp tube there is a mouth. The mouth has special tubes, something like feelers, which suck in water plankton and small fish. 2 _______. But how does a coral get calcium for its cup? The warm seawater is full of the calcium needed by a polyp for growing its cup. The softbodied polyp sits in this hard cup which it builds up around itself from calcium. And the hard reef is the cup, or “skeleton” itself. 3 _______. Only in the waters near the equator there is enough calcium, for the reef-builders.
Reef-building corals live in groups or colonies. 4 _______. When the tiny polyps die, their skeletons remain. Other corals attach themselves to hard shells and, later on, also die. A mass of dead coral rises about three feet high in 1,000 years.

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There are more than 20 different minerals in the body. 1_______. Then there are small quantities of sulphur, chlorine, magnesium, iron, copper, iodine, fluorine, cobalt, zink and others. Three of the most important minerals are calcium, phosphorus and iron. 2_______. The bones and teeth have 99 per cent of the calcium in the body. If people have enough calcium and phosphorus their bones and teeth will be strong and hard. 3_______. Milk and hard cheeses are the best sources of calcium. 4_______.

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст
Road traffic is increasing worldwide. 1 _______. However, engineers are working on Advanced safety vehicles (ASVs) which will be much safer for drivers, other road users such as cyclists, and for pedestrians. 2 _______. ASVs will be equipped with electronic sensors to prevent accidents and to make it safer for people when accidents do happen. 3 _______. Others will warn drivers when they are too close to other vehicles.
4 _______. Electric motors are very efficient and produce no pollution, but they need heavy batteries and their range is limited with current technology. Hybrid cars have both a petrol engine and an electric motor. They save about 15% of fuel. They need batteries but they don’t have to be charged overnight as the motor acts as a generator when the car brakes. Liquefied petroleum gas (LPG) is already used as a fuel. Cars can be converted easily but LPG only cuts down pollution a little. Hydrogen fuel cells may be the long-term answer. They provide clean power but each cell is very expensive.

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The device is called a Dervish. It is a mine-detonating vehicle for clearing anti-personnel mines from farmland in developing world countries. 1 _______. The United Nations estimates that 24,000 people die each year because of mines.
2 _______. Each wheel has steel teeth to create more pressure. When the teeth pass over a mine, it explodes. 3 _______. A motorbike engine powers the Dervish.          4 _______. As each wheel passes a certain point in the rotation, it slows down. This makes the machine advance in tight circles, about 30 mm apart. For this reason no mine in its path is missed.

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1 _______. When the driver brakes, the resistance of the motor helps to slow down the car. At the same time, the energy from the wheels turns the motor which then functions as a generator, producing electricity to recharge the batteries. When the batteries are low, the petrol engine also drives the generator.
2 _______. The petrol engine shuts off when the car comes to a stop. When the driver presses the accelerator, the motor instantly starts the engine again. No energy is wasted from idling when the car is stopped.
3 _______. They do not require special fuel like hydrogen cars and, unlike electric cars, they do not need to be plugged in overnight to recharge the batteries.              4 _______.

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1 _______. This logs all passenger calls and monitors the number of passengers travelling from floor to floor, the position of any car in the system, and its speed. It can direct passengers to the car which will get them to their destination fastest and will prevent any car which is overloaded from moving.
Lifts have many safety devices which make it virtually impossible for an accident to happen. 2 _______. Each one is strong enough to support the car. If the car starts too quickly, a governor or safety brake locks the car to the guide rails. 3 _______. Doors on the car ensure that no passenger can be injured by contact with the shaft. The car cannot move until both sets of doors are closed. 4 _______. All these things combined make travel in lifts one of the safest journeys you can make!