题目

下列物质的变化只与空气中水蒸气有关的是（ ） A.浓盐酸敞口放置质量减少     B.钢铁在空气中生锈 C.烧碱固体在空气中潮解      D.石灰水表面形成一层白膜 答案：A填一填。①How many hamburgers? A. Here you are.②May I have a pizza, please? B. Two hamburgers.③Who is he? C.I can draw.④Is she Kitty? D. He's my grandfather.⑤What can you do? E. No. She's Alice.