题目内容

【题目】听下面一段对话,完成五道小题,每小题填写一个这段对话你将听两遍。

【答案】

(1) interests

(2) skills and abilities

(3) your thinking

(4) groups

(5) perfect

【解析】听力原文:

Good morning, everyone. I'm Jim Martin from Happy Community. I'm happy to be here to talk about young volunteers. Here are some suggestions for you.

You need to think about your interests first. What kinds of things do you get excited about? Do you love to teach kids, work outdoors, or help people in need? Your interests may help you do volunteer activities better.

Then consider your skills. Are you good at something like sports or computers? Most volunteer groups are looking for people with skills and abilities. Try to be active in your thinking. With all the choices, you may find a volunteer chance that has never happened to you. Your effort could lead to something surprising.

Do research. You'll be surprised at the numbers of volunteer groups out there. And you can start by asking family and friends about the ones they know, or do some research on the Internet. Then follow up by calling or writing to the groups directly.

Oh, here are two more suggestions for you.

Don't be angry if you don't get the job you want right away. Your first volunteer job may be less than perfect but it can still be a good learning experience.

Don't try to do more work than you can. If you can't manage the work you volunteer to do, it can be difficult for your group and make you feel uncomfortable.

If you want to get more information about young volunteers, you can visit our website:www.youngvolunteers.com. Thank you for listening! Good luck!

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相关题目

【题目】雯雯在自学碳酸钠性质时,查到了以下资料:

CO2+Na2CO3+H2O===2NaHCO3,CO2通入饱和碳酸钠溶液会产生白色沉淀,CO2不溶于饱和碳酸氢钠溶液。

碳酸钠、碳酸氢钠在不同温度下的溶解度如表:

0

10

20

30

Na2CO3

7.1

12.2

21.8

39.7

NaHCO3

6.9

8.1

9.6

11.1

【进行实验1】验证CO2通入饱和碳酸钠溶液会产生白色沉淀

配制碳酸钠溶液:取100 g 20 的水,加入35 g碳酸钠固体,搅拌后,静置,取上层清液。

利用装置一进行实验,连续5分钟向新制得的碳酸钠溶液中通入CO2

【发现问题】实验中,始终没有看到沉淀现象,原因是什么呢?雯雯进行了以下实验探究。

【进行实验2】

实验操作

实验现象

取100 g 20 的水,加入35 g碳酸钠固体,搅拌后,静置,取上层清液

利用装置二进行实验,连续5分钟向新制得的碳酸钠溶液中通入CO2

没有出现白色沉淀

(1)在0 ~30 ,Na2CO3和NaHCO3的溶解度受温度变化影响较大的是

(2)大理石与稀盐酸反应的化学方程式为

(3)装置二中饱和碳酸氢钠溶液的作用是

【进行实验3】

实验操作

实验现象

取100 g热开水,加入35 g碳酸钠固体,完全溶解,再降温至20 ,取上层清液

利用装置一和装置二分别进行实验,连续3分钟向新制得的碳酸钠溶液中通入CO2

装置一和装置二中的碳酸钠溶液中均出现白色沉淀

(4)雯雯在最初的实验中没有看到沉淀现象的原因是

(5)CO2通入饱和碳酸钠溶液会产生白色沉淀的原因是

(6)请你依据题中信息,写出一种能够区分碳酸钠和碳酸氢钠固体的实验方案

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