湿地与森林、海洋并称为地球的三大生态系统.其中湿地又被称为“地球之肾”,下列不属于湿地功能的是( )
A.调节气候
B.防风固沙
C.蓄洪防洪
D.降解污染
答案:B
天疱疮的传统分型不包括()
A.寻常型
B.增殖型
C.落叶型
D.红斑型
E.大疱性类天疱疮
It was several minutes before the applaus _____.[ ]
A. died down
B. died out
C. died away
D. died off