【題目】t℃時某物質的溶解度100g,該溫度下,此物質的飽和溶液中下列質量關系正確的是( )
A、溶質:溶液=1:1 B、溶質:溶劑=1:1
C、溶劑:溶液=1:1 D、飽和溶液的質量一定為200g
科目:初中地理 來源: 題型:
【題目】溶液在日常生活、工農業(yè)生產和科學研究中具有廣泛的用途.下列常見的醫(yī)用溶液中,溶劑不是水的是( )
A.葡萄糖注射液
B.生理鹽水
C.消毒酒精
D.碘酒
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【題目】下表是同學們做“溶液的形成”實驗的記錄.以下說法不正確的是( )
溶質 | 碘 | 高錳酸鉀 | |||
溶劑 | 水 | 汽油 | 酒精 | 水 | 汽油 |
溶解性 | 不溶 | 易溶 | 可溶 | 易溶 | 不溶 |
A.衣服上不慎沾上碘酒,可用汽油擦洗
B.同一物質在不同溶劑中的溶解性不同
C.水、汽油、酒精都可以作溶劑
D.溶液都是均一、穩(wěn)定、無色的混合物
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【題目】Mila:Let’s play computer games.
Ella:That sounds interesting. Where’s your computer?
Mila:I don't have a computer. Do you have a computer?
Ella:No, I don't. But I have a TV. Let's watch TV.
Mila:No,that sounds boring (無趣的).Let’s play tennis. I have a tennis racket.
Ella:Good. Where is it?
Mila:On the sofa. Do you have a racket?
Ella:No, I don't. Does your brother have a racket?
Mila:Yes, he does. And he has tennis balls.
【1】Does Mila have a computer?
A. She has two computers.
B. Yes, she does.
C. No, she doesn’t.
D. She has a TV.
【2】Mila has a tennis racket. Where is it?
A. It’s on the sofa.
B. It’s under the table.
C. It’s under the bed.
D. It’s on the table.
【3】Does Ella have a tennis racket?
A. Yes,she does.
B. Yes, she has.
C. No, she doesn’t.
D. No, she hasn’t.
【4】Mila’s brother has___________.
A. a football
B. a baseball
C. a basketball
D. a tennis racket and tennis balls
【5】_______ have a tennis racket.
A. Mila and Ella
B. Ella and Ella’s brother
C. Mila and Mila’s brother
D. Ella and Mila’s brother
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【題目】The question is not easy. It’s very_______ .
A. difficult B. difficulty
C. relaxing D. not difficult
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科目:初中地理 來源: 題型:
【題目】現(xiàn)有一瓶接近飽和的硝酸鉀溶液,下列做法中不能使其變?yōu)轱柡腿芤旱氖牵?/span> )
A.加入硝酸鉀晶體 B.蒸發(fā)溶劑 C.升高溫度 D.降低溫度
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【題目】There are ______students in our class,twelve boys and eighteen girls.
A. twenty B. eleven C. fifteen D. thirty
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【題目】一定溫度下,將lg熟石灰加入到100g水中,振蕩后發(fā)現(xiàn)仍有少許熟石灰未溶解,對于靜置后得到的上層清液.下列說法中正確的是( )
A.它是不飽和溶液 B.它是濃溶液
C.它是稀溶液 D.它是該溫度下的飽和溶液
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