Noonehasyetsucceededinexplaini

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更新 2022-09-03
科目英语
题型单选题
难度容易
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挑错有奖

No one has yet succeeded in explaining the ___ of how life began.

A．cause

B．problem

C．reason

D．puzzle

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相关试题

It is wise of you to well trained workers for untrained ones in your workshop.

A．substitute

B．change

C．exchange

D．employ

题型：未知
难度：未知

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Many students listened to the lecture, but I wondered how much they .

A．took out

B．took up

C．took off

D．took in

题型：未知
难度：未知

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The customs office is your luggage is inspected when you enter or leave a country.

A．where

B．when

C．why

D．who

题型：未知
难度：未知

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We are proud of our hometown, which is in coal and natural crystal（水晶石）.

A．abundant

B．universal

C．remote

D．autonomous

题型：未知
难度：未知

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However much you have done, you ought to the help you’ve received from others.

A．donate

B．acknowledge

C．conduct

D．guarantee

题型：未知
难度：未知

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