现有下列物质：①氧气；②石灰石；③冰水共存物；④干冰；⑤澄清石灰水；⑥氯酸钾；⑦稀盐酸；⑧水银．用序号填空：
（1）属于混合物的有______，（2）属于化合物的有______，
（3）属于单质的有______，（4）属于氧化物的有______．
（1）石灰石的主要成分是碳酸钙，还含有一些其它物质，属于混合物；石灰水中含有水和氢氧化钙，属于混合物；盐酸中含有氯化氢和水，属于混合物．故填：②⑤⑦．
（2）冰水共存物、干冰、氯酸钾等物质都是由不同种元素组成的纯净物，属于化合物．故填：③④⑥．
（3）氧气、水银等物质都是由一种元素组成的纯净物，属于单质．故填：①⑧．
（4）冰水共存物、干冰等物质都是由氧元素和另外一种元素组成的化合物，属于氧化物．故填：③④．
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| The car, running along the welllit road now sank in darkness. I broke the 1 on purpose, 2 that the driver was too tired to drive. "When do you go back home in the evening?" "9 o'clock after this 3 ." "Then when do you come out in the morning?" I 4 another question. "9 o'clock, too-just as if I worked at an office." His 5 surprised me, because every time I ride a taxi, what I 6 from the driver are only complaints that they have to work from morning till night, it's hard to earn money, they're often 7 by the police, or that their leaders are seated lazily, 8 the fruits. But this driver told me, "I find it 9 to be a section chief as I was before. I like driving just for 10 . It's fortunate that I hardly drive 11 a passenger. So I earn two or three thousand yuan a month with ease. Yes, I never 12 an empty taxi. If it goes southward, I go northward. If it goes along a 13 , I turn into a narrow street..." His words showed his 14 with his life and the pride he 15 in his job. Such feelings are so rare among people nowadays as oxygen in high 16 . As an ancient saying goes, "Neither joy in material 17 nor grieve (悲痛) over personal setbacks." How many people nowadays can show high ideals by 18 living and go far with a calm mind? I couldn't help feeling 19 when finding such a state of mind in a stranger on a cold 20 . | ||||
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