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2023衡中同卷重庆押题卷生物3

54℃

A.据图1可知EcoRII的识别序列为GAATTC一,切割位点在G和A之间B.据图2可知琼脂糖凝胶的加样孔在B端,且连着电泳槽的负极C.据图2可知该DNA分子最可能是含1000个碱...

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衡中同卷全国押题卷2023英语2

46℃

how much it costs to sign up to Westfield,the good news is-it's not very much!To encourageyoung people to get fit,there is currently a 50%discount on...

衡中同卷全国押题卷2023英语2

衡中同卷全国押题卷2023英语2

50℃

how much it costs to sign up to Westfield,the good news is-it's not very much!To encourageyoung people to get fit,there is currently a 50%discount on...

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2023年衡中同卷湖北押题卷化学

59℃

CH2Br15.(10分)溴甲基环丁烷)是合成阿片类镇痛药的重要中间体。其新的合成路线之一如图所示。COOHBr入√入OC2Hs稀硫酸BTEAB△■160℃,CgHg0240%KOHBOC2HsC COOH0川N...