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　　QThe word “stratification” in Paragraph 3 is closest in meaning to ________.

　　A．variety

　　B．authority

　　C．division

　　D．qualification

　　[答案]　C　词义猜测题。根据画线词所在句子“Britain seems to have a love of stratification.”，再结合上文中提到的英国人喜欢把自己定位于某个等级可知，该句是指，英国似乎很喜欢这种等级划分。A项意为“不同种类”；B项意为“权威”；C项意为“划分，分开”；D项意为“品质，资格”。故答案选C。

　　技能演练[2016·长春质监]Scientists in Argentina have created the world's first cow with two human genes that will enable it to produce humanlike milk.

　　Genetic engineering was used to introduce the “mothers' milk” genes into the animal before birth, according to the National Institute of Agribusiness Technology in Buenos Aires.

　　As an adult, the cloned cow “will produce milk that is similar to

　　that of humans” , which will

　　prove “a development of great importance for the nutrition of infants (婴儿)”， said

　　the institute. “The cloned cow, named Rosita ISA, is the first in the world with two human genes that contain the proteins present in human milk，” said the statement.

　　In April, scientists in China published details of research showing that they had created dairy cows which produced milk containing proteins found in human breast milk. But the Argentine team said the Chinese only introduced one human gene. While their research involved two, meaning the milk will more_closely_resemble that of humans.

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