在生物化学反应中，当底物与酶的活性位点形成互补结构时（如甲图A所示），可催化底物发生变化。酶抑制剂是与酶结合并降低酶活性的分子，其中竞争性抑制剂与底物竞争酶的活性位点，从而降低酶对底物的催化效应；非竞争性抑制剂和酶活性位点以外的其他位点结合，能改变酶的构型，使酶不能与底物结合，从而使酶失去催化活性。下列有关叙述不正确的是

“五十六个星座，五十六枝花，五十六族兄弟姐妹是一家……”当你唱起这首歌的时候，你会想到的是下列哪一项政治制度与之密切相关（    ）

    Davidson Black was a____(Canada) doctor who organized the excavation that led to the discovery of the bones in the Zhoukoudian____(cave) near Beijing. He was a specialist in the study of bones____it was his ambition to find and identify bones of early humans. His university was aware____the significance of his work. At first they gave him ample time to do his research, but____(late) they realized he was prepared to pursue it regardless of his students' needs and his____(teach) career, so they forbade him ____(travel) there any more. It was his assistant, Pei Wenzhong____made the discovery of these primitive bones and____(sharpen) tools. Davidson Black knew that his success was almost ____(entire) due to his assistant's systematic hard work.