Which of the following is the smallest in size、

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• 1What do the underlined words “a grey area” in paragraph 2 refer to、

  A.The discovery of unknown chemicals.

  B.Viruses in a state of living and not living.

  C.A difficult question unsolved about viruses.

  D.The colour of viruses between black and whit

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• 2What makes a virus come to life、

  A.A large chemical molecule.

  B.A dead chemical.

  C.An active virus.

  D.A living cell.

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• 3What is this text mainly about、

  A.How viruses should be understood.

  B.The effect viruses have on living things.

  C.How filters are used in studying viruses.

  D.The researches scientists do with viruses.

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• 4What is the advantage of upcy cling according to Szaky、

  A.The cost is kept low.

  B.The product is free.

  C.The product has a longer life.

  D.More materials are available

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• 5How did Szaky get the idea of upcy cling、

  A.From his visits to foreign companies.

  B.From his studies at Princeton University.

  C.Through shopping at big stores in America.

  D.Through the experience of a business competition.

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• 6With Scotland Travelpass, you can ____.

  A.use Internet service

  B.buy discounted maps

  C.have free use of public transport

  D.enjoy free entry to many museums

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• 7One use of the London Pass is to ____.

  A.save you from waiting at some tourist sights

  B.offer you free bus rides throughout London

  C.enable you to shop online with discounts

  D.guide you to London’s best restaurants

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• 8Which is most useful if you plan to go to shows in London、

  A.The GBH Pass.

  B.London for Less.

  C.The London Pass.

  D.Scotland Travelpass.

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• 9What service can a GBH card offer for a fixed period time、

  A.50% discount for public transport.

  B.Cheap prices for hotels in central London.

  C.A 15-day pass to any attractions in Britain.

  D.Free entry to many British historical places.

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