题目

单词拼写 根据句意和括号内所给单词、中文注释，用词的适当形式填空。【1】My parents want to meet an old friend of _____________ (they) at the party.【2】Mary is good at dancing. Nobody can dance__________(well) than her.【3】The key rings on the table are those ______________. ( postman)【4】We are getting ready for our grandpa’s _______________ (ninety-nine) birthday.【5】-----Tom, what’s your father doing?----He’s _________(检查) my homework.【6】Young people often get a lot of _______________ （信息）from their micro-blogs（微博）.【如图所示，试管中盛装的是红棕色气体(可能是混合物)，当倒扣在盛有水的水槽中时，试管内水面上升，但不能充满试管，当向试管内鼓入氧气后，可以观察到试管中水柱继续上升，经过多次重复后，试管内完全被水充满，原来试管中盛装的不可能是A.NO2一种气体B.O2与NO2的混和气体C.NO与NO2的混和气体D.N2与NO2的混和气体