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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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If she had known what lay ____ for her, she would never have agreed to go.

A．in demand	B．in debt
C．in place	D．in store

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难度：未知

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The frozen waterfall has attracted floods of tourists to ____ the natural beauty.

A．cherish

B．admire

C．observe

D．discover

题型：未知
难度：未知

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Although he has become wealthy, Mr. Wood remains _______ he used to be, modest and friendly.

A．that

B．how

C．who

D．what

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难度：未知

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Modern plastics can _________ very high and very low temperatures.

A．stand

B．keep

C．hold

D．remain

题型：未知
难度：未知

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---What does PM2.5 mean?
--- It’s a professional ______ indicating the condition of air pollution.

A．number

B．mark

C．term

D．item

题型：未知
难度：未知

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