Last month, part of Southeast Asia was struck by floods, from ______ effects the people are still suffering.[ ]

A. that

B. whose

C. those

D. what

人类嘧啶代谢的主要产物是（）

A.β-氨基异丁酸

B.尿囊素

C.次黄嘌呤

D.尿素

E.尿酸