It is thought that modern corn may be a______of teosint and other wild species that no longer exist.

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问题 It is thought that modern corn may be a______of teosint and other wild species that no longer exist.

选项 A、hybrid
B、combination
C、compound
D、mixture

答案A

解析句意：人们认为现代玉米可能是墨西哥类蜀黍和其他已不存在的野生品种的杂交。hybrid(指动植物)杂交。符合句意，因此选A项。combination结合。compound(通常指化学上的)混合物。mixture混合物。

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本试题收录于： C类竞赛（非英语专业本科）题库大学生英语竞赛（NECCS）分类

C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

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It is thought that modern corn may be a______of teosint and other wild species that no longer exist.

C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

Theconceptofpersonalchoiceinrelationtohealthbehaviorsisanimportantone.Anestimated90percentofallillnessesmay

Didyoueverhavean【D1】______oranideathatyouknewwasimportant,butyoucouldn’tputitintowords?Poetryisonekindof

Whoisthewomanmostprobablyspeakingto?

Theotherday,myfriendJohndrovehiscardownthestreetatIthoughtwasadangerousspeed,andsurprisedeveryone

BecauseoftheWatergateScandal,President______resignedfromhisoffice.

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Whatresearcharethespeakerstalkingabout?

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