问题 选择题

下列有关实验的叙述正确的是

A.滴定管洗净后,直接注入标准液进行滴定

B.某溶液先加入稀盐酸无明显现象,再加入BaCl2溶液产生白色沉淀,说明原溶液中含有SO42

C.配制一定物质的量浓度的稀硫酸时,向容量瓶中加入适量的水,再缓缓注入事先量取的浓硫酸

D.某气体能使湿润的蓝色石蕊试纸变为红色,则该气体为氨气

答案

答案:B

题目分析:A、滴定管洗净后,必须用标准液润洗,然后才能注入标准液进行滴定,A不正确;B、某溶液先加入稀盐酸无明显现象,排除(CO3)2以及Ag等干扰,然后再加入BaCl2溶液产生白色沉淀,说明原溶液中含有SO42,B正确;C、容量瓶不能原来稀释溶液或溶解固体,所以配制一定物质的量浓度的稀硫酸时,应该先在烧杯中稀释浓硫酸,冷却后再转移至容量瓶中,C不正确;酸能使能使石蕊试液变红色,所以能使湿润的蓝色石蕊试纸变为红色的气体应该是酸性气体,氨气是碱性气体,能使湿润的红色石蕊试纸变蓝色,D不正确,答案选B。42检验、稀硫酸的配制以及气体的检验等

阅读理解

阅读理解

      China's "Little People's Kingdom"is a theme park,where little people dance and sing in fairytale

costumes,drawing both curious groups and criticism.The theme park,near Kunming City in Yunnan

Province,employs 108 dwarfs from across the country,who gather on an artificial hillside twice a day to

dance and sing for tourists.And all pretend to live in a tiny hilltop village.

     The guests can watch shows like comedies,group dance and acrobatics.The show's centerpiece,a

funny performance of Swan Lake,sees performers dressed in special pink costumes and pretending to be

little swans."The first time I performed it (Swan Lake)I felt a bit embarrassed.I had never worn a skirt like that before.But later,once I got used to it,I found I could do it very well,"said Chen Ruan,21,from Hunan

Province who joined the park when it opened.

      For many of the employees,the park offers a rare opportunity to find work.As unlikely as it seems for men and women doing daily funny performances of Swan Lake,they think that it feels good to live in

dormitories that look like caves while living with people with similar experiences.In addition,the life facilities in the park are made according to their special needs.Besides,performers in the park earn 2,000 yuan a

month,around twice the salary of a high school graduate.

      The founder of the park,Chen Ming,made his fortune by producing electronics and investing,but said

he had always wanted to help the disadvantaged groups in the community.People,like human right activists for the disabled,think that such a park only encourages the discrimination against little people.

The only requirement for participants to be employed at the theme park is to be shorter than 51 inches and be able to take care of themselves in daily life.The youngest employee is 18,and the oldest 48.

1.According to Chen Ming,he founded the park to ________.

A.do good for society

B.invest money and increase his fortune

C.create a ballet show of Swan Lake

D.let people know more about the dwarfs

2.After living in the"Little People's Kingdom"for some time,many employees feel ________.

A.discriminated 

B.boring   

C.embarrassed  

D.satisfied

3.Which qualifications should the employees in the theme park meet?

a.Having the ability to look after themselves.

b.No taller than 51 inches.

c.Aged between 18 and 48.

d.Being a high school graduate.

A.a,b. 

B.a,c.  

C.b,d.  

D.c,d.

4.What can be learned from the text?                 

A.The employees perform for tourists in nature.

B.The employees perform twice a day.

C.The 108 employees come from all over the world.

D.The park lies in the city of Kunming.

5.What is the author's attitude towards the park?

A.Positive.  

B.Negative.

C.Neutral(中立的). 

D.Doubtful.

6.用30词左右概括文章大意

                                                                                                                                                               

                                                                                                                                                              

                                                                                                                                                             

名词解释