多肽链中主链骨架的组成是 A.-NCCNNCCNNCCN- B.-CONHC

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问题 多肽链中主链骨架的组成是A.-NCCNNCCNNCCN-B.-CONHCONHCONHC.-CHNOCHNOCHNO-D.-CNOHCNOHCNOH-E.-CNHOCNHOCNHO-

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答案B

解析
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