Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.

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问题 Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.

选项 A、determined
B、argued
C、pretended
D、hypothesized

答案A

解析题干中ascertained“确定”，选项中determine“决定”，argue“争论”，pretend “假装”，hypothesize“假设”，选项A最接近题干意思。

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Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.

在职申硕（同等学力）英语

Zooshavebecomeanimportantsiteforthepreservationandprotectionofwildliferesources,【C1】______thosespeciesthatareen

Zooshavebecomeanimportantsiteforthepreservationandprotectionofwildliferesources,【C1】______thosespeciesthatareen

Intheearly20thcentury,ahousenamedCleverHanswasbelievedcapableofcountingandotherimpressivementaltask.Afterye

WillthereeverbeanotherEinstein?ThisistheundercurrentofconversationatEinsteinmemorialmeetingsthroughouttheyear.

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