某合作学习小组讨论辨析以下说法：①粗盐和酸雨都是混合物；②沼气和天然气都是可再生能源；③冰和干冰既是纯净物又是化合物；④不锈钢和目前流通的硬币都是合金；⑤盐酸和食醋既是化合物又是酸；⑥纯碱和熟石灰都是

题干

某合作学习小组讨论辨析以下说法：①粗盐和酸雨都是混合物

；②沼气和天然气

都是可再生能源；③冰和干冰既是纯净物又是化合物；④不锈钢和目前流通的硬币都是合金；

⑤盐酸和食醋既是化合物又是酸；⑥纯碱和熟石灰都是碱；⑦豆浆和雾都是胶体。上述说法正确的是:

A：①②③④

B：①②⑤⑥

C：③⑤⑥⑦

D：①③④⑦

上一题下一题 0.0难度选择题更新时间:2018-05-26 08:39:29

答案(点此获取答案解析）

D

同类题3

根据句意及所给中文提示或英文解释，写出句中所缺单词，每空限填一个单词。
People like travelling in ____ (春天) because it is neither too hot nor too cold.
—What's your father's ____ (职业)?—He is a doctor.
The 30^th Olympic Games will be held in London, the ____ (首都) of England.
Lucy is polite and ____ (乐于助人的). We all like her.
Our maths teacher asked you to go to his office____ (立即). He is waiting for you.
Colours can change our moods and some may make us feel ____ _ (in need of sleep).
Hurry up, or we can't____ (arrive at) the railway station on time.

题干

答案(点此获取答案解析）

同类题1

同类题2

同类题3

同类题4

同类题5