题目

TikTok, known as Douyin in China, is a social media platform ________ short videos can be edited and uploaded easily. A . that B . which C . where D . when 答案：C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”