Though I admire him much as a writer, I do not like him as a man.
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Although he is a child, he knows a lot.
Though he worked hard, he didn’t finish the work satisfactorily.
_____和_____构成核苷,_____和磷酸构成核苷酸,核苷酸通过_____相连接,构成核酸。生物体中主要含有两类核酸,其中主要分布在细胞核中的是_____,在细胞质中的是_____。
2.DNA主要含有_____、_____、_____和_____四类碱基,RNA主要含有_____、_____、_____和_____四类碱基。