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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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相关试题

Everyone knows that ______ is dangerous to play with fire, but ______ is difficult is to prevent children from playing with fire.

A．it, it

B．what, what

C．it, what

D．what, it

题型：未知
难度：未知

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Keep in mind that you should try to spend your time on what you find ______.

A．worthwhile doing	B．worth doing
C．worthy of doing	D．worthy to do

题型：未知
难度：未知

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Present ______ the ceremony were the honorable heroes, who were presented ______ awards for their good deeds.

A．at; with

B．for; for

C．in; to

D．with; in

题型：未知
难度：未知

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Down ran an old man who was ______ convinced of the benefits of running, so he ran everyday.

A．roughly

B．mildly

C．firmly

D．deliberately

题型：未知
难度：未知

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Have you ever had a case ______ the opinion you had stuck ______ turned out wrong.

A．where; to

B．which; with

C．that; in

D．where; out

题型：未知
难度：未知

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