【题目】下列对实验现象或结论的描述中错误的是( )
A.碘易溶于水
B.高锰酸钾几乎不溶于汽油
C.水和植物油混合后用力振荡可形成乳浊液
D.乙醇能与水互溶
科目:初中地理 来源: 题型:
【题目】下表是某实验报告中的一组数据:
实验 序号 | 试剂1 | 试剂2 | 混合前 温度/℃ | 混合后最高或最低温度/℃ |
① | 3.2 mL水 | 3.2 g Na2CO3固体 | 20 | 24.3(t1 ) |
② | 35 mL稀盐酸 | 3.2 g Na2CO3固体 | 20 | 25.1(t2 ) |
③ | 35 mL水 | 2.5 g NaHCO3固体 | 20 | 18.5(t3 ) |
④ | 35 mL稀盐酸 | 2.5 g NaHCO3固体 | 20 | 16.2(t4) |
(1)从实验①、③数据可知:Na2CO3溶于水________热量,NaHCO3溶于水________热量(填“放出”或“吸收”)。
(2)根据t2>t1 可知Na2CO3与稀盐酸反应______热量,根据t4<t3 可知:NaHCO3与稀盐酸反应______热量(填“放出”或“吸收”)。
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科目:初中地理 来源: 题型:
【题目】A
Tony and Anna are brother and sister. They are Americans. Tony likes sports very much. He can play football, basketball and volleyball. Anna likes music very much. She can’t play ball games. But they both like playing games on computers.
They like eggs, bread and milk for breakfast. For lunch, Anna likes eating vegetables and fruit, but Tony likes chicken and fish. They both like hamburgers. But they don’t like ice cream or cheese.
【1】 Anna is Tony’s __________ and they are __________.
A. sister; Chinese B. sister; Americans
C. friend; Americans D. brother; Americans
【2】 Tony likes __________ and he can play __________.
A. sports; games B. music; basketball
C. sports; volleyball D. sports; tennis
【3】Tony and Anna both like __________.
A. vegetables B. football
C. playing games D. ice cream
【4】For breakfast, they like __________.
A. eggs, bread and milk B. ice cream or cheese
C. chicken and fish D. vegetables and fruit
【5】 They don’t like __________ or __________.
A. ice cream; vegetables B. ice cream; cheese
C. chicken; fish D. hamburgers; cheese
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科目:初中地理 来源: 题型:
【题目】完形填空(10小题,每小题1分,共10分)
More and more Americans are going to work by bike. Do you know why more people are 1 bikes to work? We can answer the question in 2 ways. First, bikes don’t need gasoline(汽油), so it takes 3 money to use them. Second, a bike doesn’t 4 much space(空间), so it is 5 to find a place for it. And riding a bike is good for one’s 6 . People often drive their 7 to offices or to shops, but now people think riding bikes is a good way of doing sports.
That’s 8 more Americans are now going to work 9 bike, and they are 10 their own cars at home.
【1】 A. making B. riding C. jumping D. believing
【2】 A. popular B. different C. famous D. friendly
【3】 A. less B. more C. much D. many
【4】 A. mend B. need C. have D. find
【5】 A. easy B. hard C. cheap D. expensive
【6】 A. journey B. health C. study D. work
【7】 A. buses B. trains C. cars D. boats
【8】 A. what B. why C. how D. where
【9】 A. by B. on C. at D. in
【10】 A. cleaning B. leaving C. staying D. learning
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科目:初中地理 来源: 题型:
【题目】指出下列溶液中的溶质和溶剂,将其填入下表中.
溶液 | 溶质 | 溶剂 |
(1)生理盐水 | ||
(2)澄清的石灰水 | ||
(3)碘酒 | ||
(4)稀盐酸(氯化氢气体的水溶液) | ||
(5)高锰酸钾溶液 | ||
(6)酒精溶液 |
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科目:初中地理 来源: 题型:
【题目】“摇摇冰”是一种即用即冷的饮料。吸食时将饮料罐隔离层中的化学物质和水混
合后摇动即会制冷.该化学物质是 ( )
A.氯化钠 B.固体硝酸铵 C.固体氢氧化钠 D.生石灰
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