What did the study published in PLOS Medicine two years ago suggest?

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• 1Why is not the digital services levy set as a sales tax?

  ABecause the companies are registering their profits in other countries.

  BBecause a sales tax may be transformed into a burden on consumers.

  CBecause ifs not sustainable or fair to impose the tax on such companies.

  DBecause the companies sell goods or services on the Internet.

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• 2what did Tu Youyou do?

  AShe shared the prize with three other scientists.

  BShe won a prize of 4 million Swedish kronor.

  CShe discovered chloroquine, an anti-malarial drug.

  DShe discovered the malaria parasite resistance.

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• 3 what did Tu Youyou do?

  AShe shared the prize with three other scientists.

  BShe won a prize of 4 million Swedish kronor.

  CShe discovered chloroquine, an anti-malarial drug.

  DShe discovered the malaria parasite resistance.

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• 4 Why 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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• 5The Belgian royal family was annoyed by Burger King’s advertising campaign calling for a referendum

  对

  错

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• 6 The Belgian royal family was annoyed by Burger King’s advertising campaign calling for a referendu

  对

  错

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• 7Successful candidates for the Tesla autopilot software engineer position do not need to have prior e

  对

  错

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• 8A good many online dietary instructions do not rest on solid scientific grounds.

  对

  错

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• 9Why 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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• 10What 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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