是2010浙江丽水的中考选择题第十题！

（1）Ca(OH) 2 +CO 2 ===CaCO 3 ↓+H 2 O（2）C+CuO Cu+CO↑（3）二氧化碳和一氧化碳的混合物（4）先通入气体产物，观察澄清石灰水是否变浑浊，然后加热，再观察黑色粉末是否变成红色。 分析：（1）根...

其实很简单,答案为:
My hometown is the Zhejiang Lishui, is a very beautiful city,throughout the year as beautiful as a painting. Spring, on themountain the bird sounds, the hundred flowers open, the sunlightscatters down from the leaf between, according to on the place, treebetween on the forest also has each kind of bird. In the autumn, thehometown also has very many delicacies the fruit, I love hometownLishui.

Great changes has happend nearly this years.With the economy and science developed at a very speed,we can feel something increased in our lives that we can enjoy our lives better.
the road got to broader,the mansion and building changed to more and more,even the atmosphere and enviorment around us got to reach perfect.
the city also got beautiful,we can walk to the park and the lake to breath well.
the civilization and the standard of living got better that we can lead a beatific life.
Our city is very big in our country .It is beautiful and mild in climate.It has a population of one million.The people are friendly and working hard.There have been many new changes in our city.A lot of bridges have been built cross the rivers.There are also some new high ways and fly-overs.It is easy and convenient for you to travel in our city.Shopping is easy,too.You can go to any shops and supermarkets to select anything you like .I feel happy and comfortable to live in such city.

（1）A （2）②→③→⑤（3）蓝紫色

：（1）用过氧化氢溶液和二氧化锰制取氧气，不需加热，属于固液常温型，所以选择发生装置A；过氧化氢在二氧化锰的催化作用下生成水和氧气，方程式是
2H ₂ O ₂ 2H ₂ O+O ₂ ↑；
（2）用浓硫酸作干燥剂，气体从长导管进入，短导管出，氧气的密度比空气大，所以应从长管进气，短管排空气；①→②→③→⑤
（3）硫在氧气中燃烧发出明亮的蓝紫色火焰；

从2、3组数据说明,1组中加入的硫酸不足,10g粉末中Cu为8g,CuO为2g,所以应根据1组计算,而2、3组不能确定硫酸是否足量或过量多少,1组可确定加入的硫酸全部参加反应,故根据1组进行计算