问题 问答题 简答题

硝化纤维成膜剂的特征?

答案

参考答案:

硝化纤维成膜剂形成的薄膜弹性好,光亮、滑爽,涂饰后不需要固定,熨平后可提高亮度。其中,纯硝化纤维在成膜后随着增塑剂的散失,涂层易变硬、变脆,有时会变黄,改性硝化纤维粘着力较强,成膜柔韧性,耐挠曲性能好。相对而言,溶剂型硝化纤维形成的薄膜光亮度高,耐擦坚牢度高,水乳型硝化纤维形成的薄膜在上述性质不如前者。

阅读理解

阅读理解。

     The time of a baby is born can decide what jobs they will work on in later lives, a new study has

suggested.  

     Being born in a certain month seems to show the statistical (统计学的) likelihood (可能性) of

what job a person will end up with.    

     Researchers have found that the month in which babies are born could also affect everything from 

intelligence (智力) to length (长度)of life.    

     A child born in December is more likely (很可能的) to become a dentist while someone whose 

birthday falls in January will tend to be a debt collector (收账人), they found.    

     A February birth seems to increase the chances of being an artist while March babies seem to

become pilots.    

      Meanwhile, April and May babies are said to have a fairly (公平的,均等的) even spread of jobs;

births in the summer months mean a much lower chance of becoming a high-earning football player,

doctor or dentist.  

     The study was made by researchers who analysed (分析) the birth months of people in 19 different

occupations (职业) using information from the last census (人口普查), the Daily Mail reported.  

     Although these things may be difficult to explain,  relations between birth months and specific health

problems have a scientific basis (依据).

1. A child born in December is perhaps to become a ______.  

A. dentist      

B. debt collector      

C. researcher    

D. pilot

2. Researchers have found that the month in which babies are born could also affect ______.

A. nothing      

B. information      

C. length       

D. age

3. In the passage "Meanwhile" has the same meaning as "______".

A. Suddenly    

B. For example    

C. Finally    

D. At the same time

4. The study was reported by ______.

A. the China Daily        

B. a scientific basis

C. the Daily Mail        

D. the last census

5. What is the best title for the passage?    

A. The study was made by researchers.    

B. The month of a baby is born can decide what jobs they will have.

C. Someone whose birthday falls in January will tend to be a debt collector.

D. Things may be difficult to explain.

填空题