一个正常成年人即使一天不摄入蛋白质,也要通过各种途径向体外排出其代谢产物,换算为蛋白质约______。
参考答案:20g
---Hi, Terry, can I use your computer for a while this afternoon?
---Sorry. _____ .[ ]
A. It’s repaired
B. It has been repaired
C. It’s being repaired
D. It had been repaired
哺乳动物体内氨的主要去路是()
A.转氨基作用
B.鸟氨酸循环
C.嘌呤核苷酸循环
D.谷氨酸氧化脱氨基作用