单项选择题
A.mRNAB.tRNAC.rRNAD.scRNAE.snRNA
A.DNAB.mRNAC.tRNAD.rRNAE.小分子RNA
A.CTGATCAGCGACB.CTGAGTACTGCAC.ACGTCAGTACGCD.ACGTCATGAGTCE.CTACGTAGACCA
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