What do the underlined words“a grey area”in paragraph 2 refer to?-考呗网题库移动版

单选题 What 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 white．

参考答案B

解析: 推理题。题干意为“第二段中划线词组a grey area指的是什么?”。由文章第二段可知，科学家们总是把有生命和无生命的物体视作是截然相反的两者。随着病毒的发现，他们开始意识到在之前的两者之间还有一个中间的领域，它并不属于任何一方。所以这里的a grey area(灰色领域)指的是病毒处于一种生命体与非生命体的中间地带。故B为正确答案。

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单选题 Which of the following is the smallest in size?

A．Viruses．
B．New filters．
C．Living cells．
D．Chemical molecules．

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单选题 根据下面资料，回答题。
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With Scotland Travelpass，you can__________．

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B．buy discounted maps
C．have free use of public transport
D．enjoy free entry to many museums

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单选题 One use ofthe London Pass is to __________．

A．save you from waifing 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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