题目

Jane's grandmother has wanted to write ______ children's book for many years, but one thing or another always got in ________ way. A . a, / B . a, the C . the, the D . the, a 答案：B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”