题目

Mary Moe may look like an average grandmother．But she is not．She just learned how to fly an airplane，a dream she has had since she was a little girl．But Mary Moe could not find time to make her dream come true．At age 34，she was just too busy to think about flying a plane．Lessons were costly．Everything seemed to be working against Mary．So her dream had to wait． Mary Moe has done a lot during the past 91 years．For much of that time，she wanted to fly，but never had the chance—until now．  Ms．Moe learned about Wish of a Lifetime, a non-profit organization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”