题目

       A month after Hurricane Katrina, I returned home in New Orleans. There   1   my house, reduced to waist-high ruins, smelly and dirty.        Before the trip, I had had my car fixed .When the office employee of the garage was writing up the bill, she  2     my Louisiana license plate. “You from New Orleans?” she asked .I said I was, “No   3    .” She said, and firmly shook her   4   when I reached for my wallet. The next day I went for a haircut, and    5   happened.        As my wife was studying in Florida ,we decided to move there and t19．不同植物种子中所含营养成分有差异，如豆类作物中蛋白质含量较高，玉米种子中淀粉含量较高，花生种子中脂肪含量相对较多．请回答下列问题．（1）表用碘液、苏丹Ⅲ染液和双缩脲试剂测得甲、乙、丙三种植物的干种子中三大类有机物颜色反应，其中“+”的数量代表颜色反应深浅程度，有关说法不正确的是A．试剂种类碘液苏丹Ⅲ染液双缩脲试剂甲+++++++乙++++++++丙+++++++A．乙种子中含蛋白质最多B．碘液、苏丹Ⅲ染液和双缩脲试剂与相应的物质发生的颜色反应分别是蓝色、橘黄色和紫色C．在观察颜色时有可能用到光学显微镜D．这三种试剂使用时均不需要水浴加热（2）某玉米新品种中的蛋白质含量高于普通玉米，请用所学的方法设计实验加以验证．实验原理：蛋白质与双缩脲试剂发生紫色反应．材料用品：新鲜的普通玉米子粒，新鲜的新品种玉米子粒，研钵，试管，漏斗，纱布，吸管，清水，双缩脲试剂A液，双缩脲试剂B液，量筒．方法步骤：①将两种玉米子粒分别进行研磨，制备组织样液．②取A、B两支试管，向A中加入新品种玉米组织样液2mL，B中加入普通玉米组织样液2mL．③向A、B两支试管中分别加入1mL双缩脲A液，摇匀，再分别加入4滴双缩脲B液，摇匀．④观察颜色变化并比较紫色的深浅．预期结果：新品种玉米子粒组织样液（A试管）紫色较深．