精氨酸可分解产生（）

A.尿酸

B.尿囊素

C.尿囊酸

D.尿素

E.β氨基异丁酸

Mistakes don’t just happen；they occur for a reason. Find out the reason，and then making the mistake becomes________.

A．favourable　　　

B．considerate

C．obvious

D．worthwhile