单选题:Lungcancer,likesomeothercancers,oftendoesn’tproduce________u 题目分类:英语四级 题目类型:单选题 查看权限:VIP 题目内容: Lungcancer,likesomeothercancers,oftendoesn’tproduce________untilitistoolateandhasspreadbeyondthechesttothebrain,liverorbones. A.trails B.therapies C.symptoms D.symbols 参考答案: 答案解析:
交感和副交感神经节前纤维释放的递质是( ) 交感和副交感神经节前纤维释放的递质是( )A.肾上腺素 B.去甲肾上腺素 C.乙酰胆碱 D.乙酰心碱和去甲肾上腺素 E.肾上腺素和去甲肾上腺素 分类:英语四级 题型:单选题 查看答案
It can be learned from the passage that( ). It can be learned from the passage that( ).A.both bills are likely to be made st 分类:英语四级 题型:单选题 查看答案
下列哪项关于酮体的叙述是错误的( ) 下列哪项关于酮体的叙述是错误的( )A.酮体是乙酰乙酸、p羟丁酸和丙酮的总称 B.生成酮体的原料是乙酰CoA C.肝既可生成酮体也可氧化酮体 D.酮体可代替葡 分类:英语四级 题型:单选题 查看答案
Many great scientists ________ their success to hard work. Many great scientists ________ their success to hard work.A.portray B.ascribe C. 分类:英语四级 题型:单选题 查看答案