精英家教网 > 初中地理 > 题目详情

【题目】在贝壳上滴稀盐酸,能产生使澄清石灰水浑浊的气体, 这说明贝壳中含有的离子是( )。

A.Ca2+ B.CO32- C.SO42- D.OH

【答案】B

【解析】

试题分析:使澄清石灰水浑浊的气体是二氧化碳。而能与盐酸产生二氧化碳气体的是碳酸盐。所以可说明贝壳中含有碳酸根离子。

练习册系列答案
相关习题

科目:初中地理 来源: 题型:

【题目】My uncle likes sports very much. He loves soccer ball, basketball, baseball, tennis and more. He plays baseball and basketball very well. He likes to watch the sports games on TV. He plays sports every day. He has a small(小的) sports collection. He has 3 tennis rackets, 2 baseballs, 3 basketballs and a soccer ball.

根据短文内容判断正(T)误(F)。

1My uncle doesn’t like sports, but he has a sports collection.

2He plays baseball and basketball very well.

3He likes to watch the sports collection on TV.

4He watches TV and plays sports every day.

5His collection is small: 3 tennis rackets, 2 baseballs, 3 basketballs and a soccer ball.

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】He usually watches TV __________ Saturday evening.

A. on B. in C. at D. for

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】书面表达(15分)

新的初中生活已经开始。假如你是刘强。请根据表格内容,写一篇介绍自己的小短文。可以适当发挥。词数40左右。开头和结尾已给出,不计入总词数

姓名

刘强

年龄

12岁

班级

七(6) 50人

爱好

踢足球 听音乐

……

Hello, everyone! ___________________________________________________________________________

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Thank you!

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】按照一定依据把物质进行分类,是研究物质的组成、结构、性质和用途的常用方法。现有三组物质:①金刚石、水银、镁条、干冰;②醋酸、小苏打、食盐、纯碱;③白酒、空气、盐酸、白磷。每组中均有一种物质所属类别与其他三种物质不同,这三种物质依次是( )。

A.金刚石、小苏打、白酒 B.干冰、醋酸、白磷

C.水银、食盐、空气 D.镁条、纯碱、盐酸

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】Id like some noodles __________ lunch. Is it OK __________ you?

A. for; with B. for; of

C. with; with D. with; of

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】词语运用(10小题,每小题1分,共10分)

先阅读短文,掌握其大意。然后从方框中所给的词中选出恰当的10个,并用其适当形式填空,每个词限用一次。(每小题1分)

quiet rain on however so walk they but smell enjoyable

I live in a small 1 nice village. I love it because its 2 , and there are a lot of trees. My friends and I often play football 3 the field near my house. 4 , after it 5 , the field is too wet to play on. We like to 6 along the river. We can 7 the flowers and listen to the birds. It is very 8 . My village is a comfortable place to live in. When my friends come to visit, I always have 9 much to show 10 .

查看答案和解析>>

科目:初中地理 来源: 题型:

【题目】You can buy socks __________ girls __________ only five dollars each.

A. to; to B. for; to C. for; for D. to; for

查看答案和解析>>

同步练习册答案