【题目】t℃时某物质的溶解度100g,该温度下,此物质的饱和溶液中下列质量关系正确的是( )
A、溶质:溶液=1:1 B、溶质:溶剂=1:1
C、溶剂:溶液=1:1 D、饱和溶液的质量一定为200g
科目:初中地理 来源: 题型:
【题目】溶液在日常生活、工农业生产和科学研究中具有广泛的用途.下列常见的医用溶液中,溶剂不是水的是( )
A.葡萄糖注射液
B.生理盐水
C.消毒酒精
D.碘酒
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科目:初中地理 来源: 题型:
【题目】下表是同学们做“溶液的形成”实验的记录.以下说法不正确的是( )
溶质 | 碘 | 高锰酸钾 | |||
溶剂 | 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.同一物质在不同溶剂中的溶解性不同
C.水、汽油、酒精都可以作溶剂
D.溶液都是均一、稳定、无色的混合物
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科目:初中地理 来源: 题型:
【题目】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 (无趣的).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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科目:初中地理 来源: 题型:
【题目】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 来源: 题型:
【题目】There are ______students in our class,twelve boys and eighteen girls.
A. twenty B. eleven C. fifteen D. thirty
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科目:初中地理 来源: 题型:
【题目】一定温度下,将lg熟石灰加入到100g水中,振荡后发现仍有少许熟石灰未溶解,对于静置后得到的上层清液.下列说法中正确的是( )
A.它是不饱和溶液 B.它是浓溶液
C.它是稀溶液 D.它是该温度下的饱和溶液
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