剑桥雅思14test1听力section4真题文本:

  SECTION 4 Questions 31-40

  Complete the notes below

  White ONE WORD ONLY for each answer.

  Marine renewable energy(ocean energy)

  More energy required because of growth in population and 31______

  What's needed

  ▪ renewable energy sources

  ▪ methods that won't create pollution

  Wave energy

  Advantage waves provide a 32______source of renewable energy

  Electricity can be generated using offshore or onshore systems

  Onshore systems may use a reservoir

  Problems:

  ▪ waves can move in any 33______

  ▪ movement of sand, etc on the 34______of the ocean may be affected

  Tidal energy

  Tides are more 35______than waves

  Planned tidal lagoon in Wales:

  ▪ will be created in a 36______at Swansea

  ▪ breakwater(dam) containing 16 turbines

  ▪ rising tide forces water through turbines, generating electricity

  ▪ stored water is released through 37______, driving the turbines in the reverse direction

  Advantages:

  ▪ not dependent on weather

  ▪ no 38______is required to make it work

  ▪ likely to create a number of 39______

  Problem:

  ▪ may harm fish and birds, e.g. by affecting 40_______and building up silt

  Ocean thermal energy conversion

  Uses a difference in temperalure between the surface and lower levels

  Waler brought to the surface in a pipe

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