题目

At Christmas, she and her husband went travelling s________---She went to France,while her husband went to Tibet. 答案：separately如图所示，U形管中装入含有紫色石蕊的溶液，通直流电，一段时间后U形管内会形成三色“彩虹”的现象，它从左到右颜色的次序是：（  ）A．蓝、紫、红B．红、蓝、紫C．红、紫、蓝D．蓝、红、紫