【单选题】____________ he is poor, he is happy.
【简答题】He was in poor health. So he didn't write many books.
【简答题】(15分)环丙沙星(G)是一种新型的广谱抗菌药物,其工艺合成路线如下: (1)反应②的反应类型为____________。物质C中最多可以有________个碳原子共平面。 (2) C转化为D,其实经历了先加成后消去两步反应,写出这两步反应的化学方程式: (3)给出下列物质的结构简式: A________________;B________________;F________________。 (...
【单选题】He is poor _____ he is happy all the time.
【简答题】查找诺氟沙星的合成路线与环丙沙星比较,能得出那些有意义思考?
【单选题】以环丙沙星为参照,采用模拟类推法,可以完成下列哪种药物的合成工艺路线设计( )
【单选题】The artist was born poor, poor he remained all his life.
【简答题】【图片】谱例中的每个小节都是完整的小节。因此,根据拍号,红色五角星处如果填入附点四分音符,应该填_____个。(答案用阿拉伯数字)
【单选题】He has _____ that sometimes he can’t see an inch ahead.
【简答题】查找诺氟沙星的合成路线与环丙沙星比较,能得出哪些有意义的思考?