题目内容

不属于胰腺后方毗邻结构的是

A. 下腔静脉和胆总管
B. 腹主动脉
C. 左肾和肾上腺
D. 脾静脉和右肾静脉
E. 左、右输尿管起始段

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下列何者是胰头后方的毗邻

A. 右肾静脉
B. 腹主动脉
C. 右输尿管起始段
D. 下腔静脉
E. 门静脉

They are the energy currency in metabolic transactions, the essential chemical links in the response of cells to hormones and other extracellular stimuli, and the structural components of an array of enzyme cofactors and metabolic intermediates.

A segment of a DNA molecule that contains the information required for the synthesis of a functional biological product, whether protein or RNA, is referred to as a gene.

Nucleotides have a variety of roles in cellular metabolism.

A. 核苷酸
B. 核苷
C. 核膜
D. 核酸