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雅思听力 Part 4 · Insects as a food source

Listening Part 4 · 10 题 · 音频可反复播放

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Part 4 · Insects as a food source

Questions 31-40

Complete the notes below.
Write ONE WORD ONLY for each answer.

Insects as a food source

Reasons of being a food source

  • They have a lot of protein and contain 31 .
  • Their waste products don't harm the soil or the 32 on farmland.
  • Their production requires less expense and little 33 compared to other animals.
  • Some can be added to animal feed as a kind of 34 .

The wild versus farming

From the wild:

  • it could lead to the loss of a species
  • people may be harmed by the 35 they contain.

Insect farms:

  • this can supply the growing demand in the 36 of some countries
  • the 37 of the insects may be affected.

The challenges

  • Different kinds of insect require a different temperature to breed.
  • Farmers and researchers are unclear how to deal with 38 .
  • Better tanks need to be developed so 39 faster.
  • Farmers need to develop a strategy for 40 the insects.
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