Whenitresearchintoheartdisease

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更新 2022-09-03
科目英语
题型单选题
难度中等
浏览 1855

When it ______ research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.

A．refers to

B．related to

C．comes to

D．talks to

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As soon as she entered the room, the girl caught sight of the flowers _________ by her mother.

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The clock has three hands _________.

A．at its face

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