题目

Dear Parents of the Class of 2015. On behalf of the University, we would like to invite you to attend Freshman Parents Weekend, which will take place Friday-Sunday, Oct. 14-16, 2011. Freshman Parents Weekend is designed to introduce you to some of the most important aspects of undergraduate life at Princeton. Panel discussions, lectures and presentations will provide you with opportunities to hear from and ask questions of administrators（管理者）, staff and cllege students who are familiar with the academic, campus life and residential（住校）experiences of our newest students.在北方的冬季，常见的几种物态变化现象中，属于凝华的是（　　）A．室外冻冰的衣服变干B．房间窗户玻璃的内表面出现冰花C．湖面结了厚厚的一层冰D．正在跑步的人，口中呼出“白气”