【题目】甲、乙、丙三种固体物质的溶解度曲线如右图所示,请回答:
(1)图中M点表示:____℃时,甲和乙的溶解度相等。
(2)溶解度随温度的升高而减小的物质是______。
(3)若要从甲的饱和溶液中获得甲晶体,常采
用_____ _ 的方法。
(4)t2℃时,将等质量的上述三种物质分别加入到100g水中,充分搅拌,如果得到的溶液只有一种是饱和溶液,则该饱和溶液中的溶质是______。
科目:初中地理 来源: 题型:
【题目】A man once bought a parrot. The man let him fly freely all over the house instead of putting him in the cage. The parrot was pleased with that and flew from room to room,screaming with happiness.
"Who on earth are you?" said a voice from below. "Don't make that terrible noise any more."
The parrot saw a cat staring(盯着)up at him from the floor.
"I'm a parrot. 1've just arrived and I'm to make as much noise as I can,”he said.
"Well,I've lived here all my life, " answered the cat. "I was born in this house and I learnt from my mother that it is the best to keep quiet here."
"Keep quiet then," said the parrot happily. "I don't know what you do around here, but I know my job. My master bought me for my voice and I'm going to make sure he hears it."
【1】The underlined word "master" means " " in Chinese.
A. 爸爸 B. 主人 C. 哥哥 D. 亲戚
【2】There are kinds of animals in the passage.
A. four B. three C. two D. one
【3】The cat asked the parrot to
A. listen carefully B. keep noisy
C. keep quiet D. do his job
【4】From the passage we know .
A. everyone should do his job
B. the cat sleeps every day
C. the parrot is not free
D. the cat has just arrived at the house
查看答案和解析>>
科目:初中地理 来源: 题型:
【题目】下列关于溶解度的说法正确的是( )
A.100g水溶解20g某物质刚好饱和,则该物质的溶解度为20g
B.20℃时,100g水中溶解了10g某物质,在20℃时,该物质的溶解度为10g
C.20℃时,50g水最多可溶解18g食盐,则20℃时,食盐的溶解度为18g
D.20℃时,32g硝酸钾需要100g水才能恰好完全溶解,则20℃时硝酸钾的溶解度为32g
查看答案和解析>>
科目:初中地理 来源: 题型:
【题目】like,go,she,a,black,at,be,have,and,how
Mrs.Smith 【1】 Jim's mother.She loves her family very much.She【2】 to the store everyday.She often buys food,fnit【3】clothes for Jim and Mr.Smith. Now many clothes are on sale at Renmin Clothes Store.They are 【4】very good prices.Mrs.Smith comes to the store and 【5】wants to buy some clothes.for her family. They 【6】 sweaters in all colors for ¥l5 each and sports shoes foronly ¥28.Mrs. Smith 【7】
the red sweater and she buys one for herself.She buys【8】pair of sports shoes forher son.She buys the socks for her family.【9】much are they? They are 2O yuan.They are 【10】and white.
查看答案和解析>>
科目:初中地理 来源: 题型:
【题目】小明先是在地面上走动,后又静止在地面上,则他对地面的压力和压强( )
A.压强减小,压力不变 B.压力、压强都增大
C.压力、压强都不变 D.压力不变,压强增大
查看答案和解析>>
科目:初中地理 来源: 题型:
【题目】周末做作业感到有点饿的小牛同学泡了一杯白
糖开水,他用筷子充分搅拌杯中的白糖后,将杯子放在一
边待糖水变凉,喝糖水时,发现杯底有少量未溶解的白糖
(如图)。下列操作或现象能说明糖水一定属于饱和溶液的
是( )
A.泡糖水时进行了充分搅拌
B.糖水热的时候白糖全部溶解
C.凉的糖水底部都有剩余的白糖
D.喝糖水时感到很甜
查看答案和解析>>
科目:初中地理 来源: 题型:
【题目】用36%的浓盐酸配制5%的稀盐酸的过程中,需要用到的仪器是( )
①量筒 ②天平 ③烧杯 ④胶头滴管 ⑤酒精灯 ⑥漏斗 ⑦玻璃棒
A.①③⑦
B.①③④⑦
C.②③⑤⑦
D.③④⑥
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com