题目

—Thank you very much for your wonderful lecture, Mr Bruce!—________. A.It doesn't matter                                                         B.Don't mention it         C.I'm glad you've enjoyed it                                     D.That's very kind of you to say so 答案：C 解析: 用I'm glad that you've enjoyed it说明当自己付出的努力或劳动得到别人认可时,表示感到欣慰。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”