问题 选择题

下列关于如图所示实验的说法,正确的是

A.试管1和试管2中气体质量比为2:1

B.试管1中的气体是氢气

C.试管1和试管2中气体体积比为1:2

D.该实验证明水是由氢气和氧气组成的

答案

答案:B

题目分析:电解水实验中与正极产生的是氧气,用带火星的小木条检验,负极产生的是氢气,可用燃烧法检验,正负两极气体的体积比为1:2 ,质量比为8:1 ,该实验能得出水是由氢元素和氧元素组成的结论。故选B。

阅读理解

阅读理解。

     An old woman had two large pots (罐), one on each end of a pole (扁担). She carried the pole with

the pots across her neck.

     One of the pots had a crack (裂缝) in it while the other pot was perfect and always delivered (递送)

a full pot of water. At the end of the long walk from the well to the house, the cracked pot arrived only

half-full.

      For two years this happened daily, with the woman bringing home only one and a half pots of water.

Of course, the perfect pot was proud. But the poor cracked pot was ashamed of its own imperfection.

      One day, the cracked pot spoke to the woman by the well: "I am ashamed of myself because this

crack in my side causes water to leak out all the way back to your house."

      The old woman smiled: "Did you notice that there are flowers on your side of the path, but not on the

other pot's side? That's because I have always known about your crack, so I planted flower seeds on

your side of the path. And every day while we walk back, you water them."

      "For two years I have been able to pick these beautiful flowers to decorate (装饰) the table. Without

you being just the way you are, I would not have this beauty."

       Each of us has our own cracks. But it's these cracks that make our lives together so interesting and

meaningful.

1. How did the cracked pot feel about itself at first? 

A. Proud.          

B. Happy.          

C. Excited.          

D. Ashamed.

2. Where were the flowers growing?

A. On both sides of the path.              

B. In the woman's house.

C. On the perfect pot's side.    

D. On the cracked pot's side.

3. Which is the correct order of the following events?

① The woman picked the flowers and decorated the table.

② The woman told the truth to the cracked pot.

③ The cracked pot talked to the woman about its crack.

④ The woman found a crack on one pot.

⑤ The woman planted some flower seeds.

A. ④⑤①③②                      

B. ⑤④③②①

C. ④③①②⑤             

D. ④⑤③①②

4. What does the passage mainly want to tell us?

A. Never laugh at old women.            

B. Try your best to be perfect in life.

C. Imperfection makes life meaningful.    

D. Don't use a cracked pot to carry water.

填空题