today we take electricity for granted

Read the passage and answer the following questions.

Today we take electricity for granted and perhaps we vì thế not realize just how useful this discovery has been. Steam was the first invention that replaced wind power. It was used đồ sộ drive engines and was passed through pipes and radiators đồ sộ warm rooms. Petrol mixed with air was the next invention that provided power. Exploded in a cylinder, it drove a motor engine. Beyond these simple and direct uses, those forms have not much adaptability.

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On the other hand, we make use of electricity in thousands of ways. From the powerful voltages that drive our electric trains đồ sộ the tiny current needed đồ sộ work a simple calculator, and from the huge electric magnet in steel works that can lift 10 tons đồ sộ the tiny electric magnet in a doorbell, all are powered by electricity. An electric current can be made with equal ease đồ sộ heat a huge mass of molten metal in a furnace, or đồ sộ boil a jug for a cup of coffee.

Other phàn nàn atomic energy, which has not as yet been harnessed đồ sộ the full, electricity is the greatest power in the world. It is flexible, and ví adaptable for any task for which it is wanted. It travels ví easily and with incredible tốc độ along wires or conductors that it can be supplied instantly over vast distances.

To generate electricity, huge turbines or generators must be turned. In nước Australia they use coal or water đồ sộ drive this machinery. When dams are built, falling water is used đồ sộ drive the turbines without polluting the atmosphere with smoke from coal.

Atomic power is used in several countries but there is always the fear of an accident. A tragedy once occurred at Chernobyl, in Ukraine, at an atomic power plant used đồ sộ make electricity. The reactor leaked, which caused many deaths through radiation.

Now scientists are examining new ways of creating electricity without harmful effects đồ sộ the environment. They may harness the tides as they flow in and out of bays. Most importantly, they hope đồ sộ trap sunlight more efficiently. We vì thế use solar heaters for swimming pools but as yet improvement in the capacity of the solar cells đồ sộ create more current is necessary. When this happens, electric cars will be viable and the world will rid itself of the toxic gases given off by trucks and cars that burn fossil fuels.

The author mentions the sources of energy such as wind, steam, petrol in the first paragraph to ____________

• A. suggest that electricity should be alternated with safer sources of energy
• B. emphasize the usefulness and adaptability of electricity
• C. imply that electricity is not the only useful source of energy
• D. discuss which source of energy can be a suitable alternative đồ sộ electricity

• Câu 2: Mã câu hỏi: 17132

  Before electricity, what was sometimes passed through pipes đồ sộ heat rooms?

  • A. Gas
  • B. Petrol
  • C. Steam
  • D. Wind

• Câu 3: Mã câu hỏi: 17133

  What does the author mean by saying that electricity is flexible?

  • A. It is cheap and easy đồ sộ use.
  • B. It is used đồ sộ drive motor engines.
  • C. It can be adapted đồ sộ various uses.
  • D. It can be made with ease.

• Câu 4: Mã câu hỏi: 17134

  What vì thế we điện thoại tư vấn machines that make electricity?

  • A. Voltages
  • B. Electric magnets
  • C. Generators or turbines
  • D. Pipes and radiator

• Câu 5: Mã câu hỏi: 17135

  The main forms of power used đồ sộ generate electricity in nước Australia are ____________.

  • A. atomic power and water
  • B. water and coal
  • C. sunlight and wind power
  • D. wind and gas

• Câu 6: Mã câu hỏi: 17136

  The word “they” in the last paragraph refers to ____________

  • A. harmful effects
  • B. the tides
  • C. scientists
  • D. new ways

• Câu 7: Mã câu hỏi: 17137

  Electric magnets are used in steel works to ____________.

  • A. lift heavy weights up đồ sộ ten tons
  • B. test the steel for strength
  • C. heat the molten steel
  • D. boil a jug of water

• Câu 8: Mã câu hỏi: 17138

  The advantage of harnessing the power of the tides and of sunlight đồ sộ generate electricity is that they ____________.

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  • A. do not pollute the environment
  • B. are more reliable
  • C. are more adaptable
  • D. do not require attention

• Câu 9: Mã câu hỏi: 17139

  Which of the following power source causes pollution by emitting harmful gases?

  • A. Sunlight
  • B. Petrol
  • C. Water
  • D. Wind

• Câu 10: Mã câu hỏi: 17140

  The best title for this passage could be ____________.

  • A. “Types of Power Plants”
  • B. “Electricity: Harmful Effects on Our Life”
  • C. “How đồ sộ Produce Electricity”
  • D. “Why Electricity Is So Remarkable”

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