题干

医生在治疗感染H7N9病毒的患者过程中,发现抗病毒药物对一些重症患者很难起作用,研究证明H7N9病毒已出现变异.下列对这一现象的解释中正确的是(  )

A:抗病毒药物选择使有耐药变异的H7N9病毒留下来

B:H7N9病毒的耐药性永远都是有利的

C:抗病毒药物的质量越来越差

D:H7N9病毒的繁殖速度越来越快

上一题 下一题 0.0难度 选择题 更新时间:2017-12-12 12:02:10

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A

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    As we know,there are differences between Westren culture and  Chinese  culture.____.Let's look at some words about animals and plants.Most expressions in Chinese about the dog,for example,"a homeless dog","a mad dog","A running  dog"and"A dog catching a mouse",have bad  meanings.____,In  English,people use the  dog to describe good actions.For example,"you are A lucky dog"means you are A lucky person.And‘every dog has its day"means each person has gool luck sometimes.To describe a person's serious illness,they say‘sick as a dog".The word"dog﹣tired"means very tired.____.But in Western culture,"cat"is often used ti describe a woman who is unkind.There are many other examples of how"cat"is used to describe a woman who is unkind.There are many other examples of how‘cat"is used differently as well.

    ____People think the rose stands for love,peace,courage and friendship.And the rose is the national flower of England,America and many other countries.

    ____We can learn about many differences in cultures by comparing how some words are used.

A.Howerver,Chinese love cats very much

B.The words about plants and animals are used in good or bad ways in different cultures

C.We can see differences when we pay attention to the way words are used

D.However,westerners love cats very much

E.We can see simliarities when we pay attention to the way words are used

F.The rose is regarded as a symbol of love in both China and some Western countries

G.But in Western countries,dogs are considered to be honest and good friends of humans.