答案　B

　　解析　推理判断题。根据文章最后一段第一句可知，近些年来澳大利亚的移民大多数来自东南亚地区，由此可以推知B项正确。

　　5．This passage mainly talks about Australia's

　　.

　　A. society

　　B. economy

　　C. racial problems

　　D. history

　　答案　A

　　解析　主旨大意题。通读全文可知本文介绍了澳大利亚的社会形态、城乡差异以及其移民情况，由此可知A项正确。其他选项都不全面。

　　B

　　Do you have a sore throat，a running nose and a headache? Do you keep coughing and sneezing? If you do，the chances are that you have a cold or perhaps flu—but which one? Although both colds and flu are caused by viruses，they are very different illnesses.

　　Colds, which usually last about a week, affect the nose most. They commonly cause a runny nose and sneezing. Sometimes，they cause a headache, a cough and slightly aching muscles.

　　Flu is a much more serious illness and is caused by different group of viruses. People with flu usually get all the symptoms described above. However, they also get a high fever, a dry cough and much worse aching. Fever is one of the characteristic symptoms of the flu for all ages. The symptoms also last much longer. Sometimes they don't disappear for at least two weeks.

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