题目

William Beebe, one of the first men ________ the depth of the sea in a bathysphere, got interested in oceanography because of one book. A. exploring                   B. having exploring          C. to be exploring            D. to explore 答案：D防止食品腐败所依据的主要原理是A.把食品内的细菌都杀死B.抑制食品内真菌的生长和繁殖C.杀死或抑制微生物的生长繁殖D.把食品内的真菌都杀死