A good many online dietary instructions do not rest on solid scientific grounds.

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• 1Why is it that the trade mechanisms may create even larger barriers for traders and investors?

  ABecause they are not established to promote mutual benefits.

  BBecause they cannot contribute to information-sharing and transparency.

  CBecause they are not established in a coordinated way.

  DBecause their rules are too complex to be workable.

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• 2What would astrobiologists have to do according to the passage?

  ADevelop the capacity to search surface biosignatures on other planets.

  BExplore new ways to detect green life from space.

  CProbe into how retinal pigments capture energy.

  DUse techniques to detect light signatures of purple.

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• 3What would astrobiologists have to do according to the passage?

  ADevelop the capacity to search surface biosignatures on other planets.

  BExplore new ways to detect green life from space.

  CProbe into how retinal pigments capture energy.

  DUse techniques to detect light signatures of purple.

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• 4What is told about the movie The Martian?

  AIt was on top of the box office for 14 days.

  BIt earned US$108 million worldwide.

  CIt earned 50 percent more than the production budget.

  DIt stars Mark Watney, an astronaut who was thought to die on Mars.

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• 5Why did Kathy Griffin apologize?

  ABecause her hosting style was too rude.

  BBecause she displayed a likeness of the US president in her performance.

  CBecause her mockery of the US president was political.

  DBecause the way her video mocks the US president was unacceptable.

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• 6Which of the following areas is likely to see the highest decline rate in real GDP growth in 2019 ac

  AThe United States.

  BEurope.

  CAfrica.

  DAsia.

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• 7The pending G20 summit will focus on issues including climate change，steel and migration.

  对

  错

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• 8 The pending G20 summit will focus on issues including climate change，steel and migration.

  对

  错

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• 9The pending G20 summit will focus on issues including climate change，steel and migration.

  对

  错

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• 10Why did the four enterprises from Peru attend the fair?

  ATo seek business opportunities in China.

  BTo build up cooperation with Chinese enterprises.

  CTo enhance communication in the area of technology.

  DAll of the above.

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