what didn't the man know before he comes to buy the book? what didn't the man know before he comes to buy the book?A.Medical books are exp 分类:药学专业知识(二) 题型:单选题 查看答案
除去鞣质的方法有( ) 除去鞣质的方法有( )A.加热后冷藏法 B.加石灰、铅盐或明胶等沉淀鞣质 C.在鞣质乙醇溶液中加氢氧化钠至pH9~10,鞣质成钠盐析出 D.用明胶或铅盐使其沉 分类:药学专业知识(二) 题型:单选题 查看答案