有四组同族元素的物质,在101.3 kPa时测定它们的沸点(℃)如下表所示 下列

题型:选择题

问题:

有四组同族元素的物质,在101.3 kPa时测定它们的沸点(℃)如下表所示

下列各项中正确的是[ ]

A.a、b、c的化学式分别为Ne2、Br2、HF

B.第二组物质只表现氧化性,不表现还原性

C.第三组物质中c的沸点最高,是因为c分子内存在氢键

D.第四组中各化合物的稳定性顺序为:H2O>H2S>H2Se> H2Te

考点:元素周期律
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完形填空。
     It was getting dark. Some children and two Canadian women were still __1__ on the ice near a big
 hotel. They were having a good time.
     Suddenly the ice __2__ . One of the boys fell into the water. The children shouted, "Help! Help!" They
  didn't know __3__ to do. The two Canadian friends heard __4__ and skated over to get the boy out of
  the water.
     The ice was __5__ .The two Canadians fell into the water, too. But they tried their best to __6__ the
  little boy. They knew they must be __7__ . If they didn't push him up onto the ice, he would soon die.
     Many people ran over to__8__ . Some of them had ropes and poles. A young man jumped into the
 water to save the __8__ people.
     The boy and the two Canadian women were out of water at last. One of the women didn't feel well.
 She was sent to the __10__  at once. But she felt very happy because the boy was safe.
( ) 1. A. boating
( ) 2. A. broke
( ) 3. A. who    
( ) 4. A. one   
( ) 5. A. big    
( ) 6. A. save  
( ) 7. A. slow   
( ) 8. A. play   
( ) 9. A. two    
( ) 10. A.hospital
B. skating
B. shone   
B. when   
B. him     
B. small   
B. wake   
B. quick   
B. shout   
B. three   
B. school  
C. planting
C. closed   
C. what     
C. them     
C. thick     
C. see       
C. sorry     
C. push     
C. four     
C. library   
D. swimming    
D. flew        
D. where      
D. her        
D. thin        
D. tell        
D. wrong      
D. help        
D. five        
D. garden      
题型:选择题

请找出下列各组中的错别字并改正。   

A.迫不急待  聊以自慰  姗姗来迟  毛骨悚然(   )    

B.疲惫不堪  契而不舍  语无伦次  郑重其事(   )

C.海市蜃楼  忧心重重  孜孜不倦  不毛之地(   )

D.白雪皑皑  养精蓄锐  崭钉截铁  步履艰难(   )   

题型:选择题

【1】People study their family history for different reasons. For some, genealogy(家谱学) is important to their religion. Other people who get involved in genealogy may want to confirm stories they heard about a family member. Some people say their interest in genealogy came from an eight-part series on television called Roots. Roots was first broadcast in 1977 and was based on a book which describes how the author’s ancestor, long ago in Africa, as slave was brought to America. After watching Roots, many Americans wanted to study ________________.

【2】Finding family roots is not always easy. So how exactly does someone start a genealogical research ?

【3】Experts say you should start with yourself. Write down your own history. One idea is to ask your parents what they can remember about their parents or grandparents. You can often find a lot of information in family pictures, letters and other documents.

【4】Resources on local history may also provide useful information. Large libraries may have hundreds of helpful books. In the United States, several groups have large collections of genealogical materials. These collections are open to the public.

【5】Governments often have many helpful records of genealogists. Governments usually keep official copies of birth, marriage and death records. Local governments may have copies of wills. These statements of final wishes often contain details about a person’s life and wealth.

【6】Today, many people use the Internet. There are thousands of web sites related to genealogy. They can guide people to historical records and provide information about how to write down their family’s history.

小题1:What is the passage mainly about ? (no more than 10 words)

_________________________________________________________________________

小题2:How many ways are mentioned in how to start a genealogical research ? (no more than 2 words)

_________________________________________________________________________

小题3:Fill in the blank in Paragraph 1 with proper words. (no more than 6 words)

_________________________________________________________________________

小题4:Why should people ask governments for help in the study of genealogy ? (no more than 8 words)

_________________________________________________________________________

小题5:What does the underlined word “They ” (Paragraph 6 ) probably refer to ? (no more than 5 words)

_________________________________________________________________________

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抗微生物防腐剂包括抗()和抗细菌两类。

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FSSS的基本功能有哪些?

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