【題目】下列對實(shí)驗(yàn)現(xiàn)象或結(jié)論的描述中錯(cuò)誤的是( )
A.碘易溶于水
B.高錳酸鉀幾乎不溶于汽油
C.水和植物油混合后用力振蕩可形成乳濁液
D.乙醇能與水互溶
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科目:初中地理 來源: 題型:
【題目】下表是某實(shí)驗(yàn)報(bào)告中的一組數(shù)據(jù):
實(shí)驗(yàn) 序號 | 試劑1 | 試劑2 | 混合前 溫度/℃ | 混合后最高或最低溫度/℃ |
① | 3.2 mL水 | 3.2 g Na2CO3固體 | 20 | 24.3(t1 ) |
② | 35 mL稀鹽酸 | 3.2 g Na2CO3固體 | 20 | 25.1(t2 ) |
③ | 35 mL水 | 2.5 g NaHCO3固體 | 20 | 18.5(t3 ) |
④ | 35 mL稀鹽酸 | 2.5 g NaHCO3固體 | 20 | 16.2(t4) |
(1)從實(shí)驗(yàn)①、③數(shù)據(jù)可知:Na2CO3溶于水________熱量,NaHCO3溶于水________熱量(填“放出”或“吸收”)。
(2)根據(jù)t2>t1 可知Na2CO3與稀鹽酸反應(yīng)______熱量,根據(jù)t4<t3 可知:NaHCO3與稀鹽酸反應(yīng)______熱量(填“放出”或“吸收”)。
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科目:初中地理 來源: 題型:
【題目】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 來源: 題型:
【題目】完形填空(10小題,每小題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(空間), 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 來源: 題型:
【題目】指出下列溶液中的溶質(zhì)和溶劑,將其填入下表中.
溶液 | 溶質(zhì) | 溶劑 |
(1)生理鹽水 | ||
(2)澄清的石灰水 | ||
(3)碘酒 | ||
(4)稀鹽酸(氯化氫氣體的水溶液) | ||
(5)高錳酸鉀溶液 | ||
(6)酒精溶液 |
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科目:初中地理 來源: 題型:
【題目】下列日常洗滌操作中,是利用乳化的原理達(dá)到清洗目的的是 ( )
A.用自來水清洗蔬菜
B.用汽油清洗油污
C.用洗滌劑清洗餐具
D.用酒精清洗碘漬
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科目:初中地理 來源: 題型:
【題目】“搖搖冰”是一種即用即冷的飲料。吸食時(shí)將飲料罐隔離層中的化學(xué)物質(zhì)和水混
合后搖動(dòng)即會制冷.該化學(xué)物質(zhì)是 ( )
A.氯化鈉 B.固體硝酸銨 C.固體氫氧化鈉 D.生石灰
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