题目内容

Ammonia is transported from muscles to liver mainly in the form of:

A. Free ammonia
B. Glutamine
C. Asparagine
D. Alanine

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Which of the following pathways occurs in part in the mitochondria and in part in the cytoplasm?

A. Urea cycle
B. TCA cycle
C. Glycolysis
D. Oxidative phosphorylation

Which of the following does not take part in the human urea cycle?

Arginine
B. Aspartate
C. Arginosuccinate
D. Urease

如果要限制“学生信息表”中的学号只能由“0~9”的数字组成，那么应该选择（）约束。

A. 主键
B. 外键
CHECK
D. 唯一性

CHECK约束实现的对行的约束。（）

A. 对
B. 错