Bruce Li was the first Chinese actor ___________ Chinese Kungfu ___________to the world.  

A．to make; widely known

B．making; widely known

C．made; to be widely known

D．making; be widely known

水体近期受到过污染，自净过程正在进行（）。

A.水中氨氮含量高，亚硝酸盐和硝酸盐氮含量不高

B.水中硝酸盐氮含量高，氨氮和亚硝酸盐氮含量不高

C.水中亚硝酸盐氮含量高，氨氮和硝酸盐氮含量不高

D.水中氨氮和亚硝酸盐氮含量高，硝酸盐氮含量不高

E.水中氨氮、亚硝酸盐氮和硝酸盐氮含量均高