They were fighting in order to preserve theirindependence．题目和参考答案——青夏教育精英家教网—

题目内容

4．They were fighting in order to preserve theirindependence（独立）．

分析他们为维护独立而战．

解答答案：independence 考查翻译填空．根据句意及句子结构，要填入一个名词，independence意为"独立；自主；自立"．故正确答案是：independence．

点评考查翻译填空，准确地翻译句子、理解句子，然后根据句意及提示确定所填单词词性，然后正确写出单词完成句子，使句意更通顺．

练习册系列答案

15．The sailorsabandoned （遗弃，丢弃） the burning ship．

12．Unfortunately all her money was stolen，and she had to work in alaundry（洗衣店） washing clothes．

19．Is there anyone whowitnessed（目击，亲眼看见） the robbery last night？

9．We have been trading（做生意）with their company in silk these years．

16．It is quite aninformal（非正式的）gathering； you needn't dress up for it．

11．A new study suggests that early exposure to germs（细菌） strengthens the immune（免疫的）system．That means letting children get a little dirty might be good for their health later in life．
The study involved laboratory mice．It found that adult mice raised in a germ-free environment were more likely to develop allergies．asthma and other autoimmune disorders． There are more than eighty disorders where cells that normally defend the body instead attack tissues and organs．
Richard Blumberg，who led the study，is a professor at'Harvard Medical School in Boston，Massachusetts．He says，in 1989，medical researchers who sought to explain these diseases，first discovered that the increasing use of antibacterial soaps and other products，especially early in life，could weaken immune systems．
Now，Dr．Blumberg and his team have what is the first biological evidence to link early exposure to germs to stronger adult immune systems．They say this exposure could prevent the development of some autoimmune diseases．
In the adult germ-free mice，they found that inflammation（发炎）in the lungs and colon was caused by so-called killer T cells．These normally fight infection．But they became overactive and targeted healthy tissue-an autoimmune condition seen in asthma and a disease called ulcerative colitis．
Dr，Blumberg says the mice raised in a normal environment did not have the same reaction．He says their immune systems had been"educated"by early exposure to germs．
Rates of autoimmune disorders are rising worldwide，but mostly in wealthier，industrialized countries．According to Dr．Blumberg，it might be high time that people were warned to be more careful with the early use of antibiotics（抗生素） and the prescription from their doctors．
Rob Dunn is a professor of ecology and evolutionary biology at North Carolina State University in Raleigh．He says the new study does not mean people should stop washing．"Wash your hands，but don't do it with antibacterial soap．Let your kids play in a reasonable amount of dirt and get outside and get exposed to a diversity of things"，says Rob Dunn．
71．Who first found immune systems might get harmed by overly using antibacterial products？C
A．A professor of ecology and evolutionary biology．
B．A professor at Harvard Medical School in Boston．
C．Medical researchers who tried to explain autoimmune disorders．
D．Medical researchers who tried to treat autoimmune disorders．
72．To keep healthy in the future，children had betterA．
A．play in a dirty environment once in a while
B．live in a germ-free endronrnent
C．use plenty of antibacterial soaps
D．stay in under developed countries
73．Why are germ-free mice easy to develop lung inflanunation？B
A．Because their T celh fight bacteria effectively．
B．Because their T cells attack the healthy tissues．
C．Because their lungs become abnormally active．
D．Because their lungs have weaker tissues．
74．It can be inferred from the text thatD．
A．washing hands is no longer a good habit for children
B．antibiotics will be forbidden in children's hospitals
C．exposure to dirt helps build children's character
D．the abuse of antibiotics may be condemned
75．Where does this text most probably come from？C
A．A teacher's handbook． B．A story book．
C．A science magazine． D．A travel journal．

12．February is the second month of a year．

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