嘌呤核苷酸的分解代谢终产物是()。
A.尿酸
B.酮体
C.β-丙氨酸
D.β氨基羟丁酸
E.尿素
参考答案:A
解析:最终代谢产物是尿酸,隧尿液排出。
The()is concerned with successful election, whereas the statesman is interested in future of his people.
A.politics
B.politician
C.political
D.politically
下列()不属于替代品。
A.牛肉和猪肉
B.火车票和飞机票
C.鲜奶和奶粉
D.汽车和房屋