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更新 2022-09-03
科目英语
题型单选题
难度中等
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Los Angeles Times reported that researchers may have found a way to _________ human life by changing certain genes, so that humans might expect to live twice as long.

A．extend	B．preserve
C．multiply	D．transform

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Antarctica holds 90% of the world’s ice, and most of its fresh water (70%) is in a frozen .

A．state

B．condition

C．situation

D．solution

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She has a lot of things, so she knows exactly how to deal with such a person.

A．gone through

B．gone on

C．gone by

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Parts of the cave have been badly affected by rain andto the air.

A．express

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By the time Jack returned home from England, his son from college.

A．graduated

B．has graduated

C．had been

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The Naxi believe that they came from a creature called Tabu,help them hatch from magic eggs.

A．who

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