13．A scientist responsible for finding signs of life on other planets has warned that human beings should probably think twice before making contact with aliens（外星人）．
Professor Matthew Bailes is based at Swinburne University and is leading Australia's efforts to find signs of extra-terrestrial （外星的）life．But he warned that making contact with aliens capable of transmitting powerful signals to earth over tens of thousands of light years could lead humans into disaster，because they're likely to be so much advanced．"The history of weak civilizations contacting more advanced civilizations is not a happy one!"he said．
Prof Bailes was recently put in charge of the Breakthrough Prize Foundation's $100m to search for alien life，which is being financed by Russian billionaire Yuri Milner and is backed by Professor Stephen Hawking．The team working on the project will use the Parkes radio telescope，one of the largest in the world，to scan the universe．
Prof Bailes told the news media that accurate computers would have to be installed at Parkes to sort through as many as a billion samples a second to try to detect patterns or likely signals．"There is no manual（指南） on how to find aliens．We'll have to imagine the sort of transmissions an alien race might send．"
The computers，he warned，would take a year to build，and the project has five years to run．But he said that the signal，if and when it arrives，would likely be quite weak after travelling across such vast distances．He said that scientists hope that aliens will send a pattern human beings would be able to recognize，such as prime numbers．But he warned that we might all be"long dead and buried"before we could work out how to reply and the aliens could get an answer．
32．What did the scientist warn humans？D
A．Don't send any signal to the aliens．
B．Don't receive the powerful signals from aliens．
C．Don't reply to any signal the aliens sent．
D．Don't contact with aliens casually．
33．What can we learn from Paragraph 2？B
A．The history of weak civilizations should never be forgotten．
B．The aliens'civilizations may be more advanced than humans'．
C．Human civilization needs to be developed urgently．
D．The aliens are more intelligent than humans．
34．What can we infer about the equipments at Parkes？D
A．They have scanned the universe for years．
B．They are the best equipments in the world．
C．They are capable of detecting the exact target signals．
D．They haven't been installed then．
35．Bailes'attitude of communicating with the aliens isC．
A．encouraging
B．indifferent
C．negative
D．hopeful．
分析 短文主要讲了科学家认为外星人对我们还是存在一定的危险，提醒人类要慎重与外星人接触．
解答 32．D，细节理解题，根据句子A scientist responsible for finding signs of life on other planets has warned that human beings should probably think twice before making contact with aliens（外星人）．可知，科学家提醒人类不要经常联系外星人，故答案为D．
33．B，细节理解题，根据句子But he warned that making contact with aliens capable of transmitting powerful signals to earth over tens of thousands of light years could lead humans into disaster，because they're likely to be so much advanced可知，外星人的文明发展可能比人类更先进，故答案为B．
34．D，推理判断题，根据句子Prof Bailes told the news media that accurate computers would have to be installed at Parkes 可以推测，Parkes的设备那时还没被安装，故答案为D．
35．C，态度观点题，根据句子The history of weak civilizations contacting more advanced civilizations is not a happy one!可知，Bailes认为人类跟外星人接触的结果是不好的，故答案为C．
点评 解答任务型阅读理解题，首先对原文材料迅速浏览，掌握全文的主旨大意．因为阅读理解题一般没有标题，所以，速读全文，抓住中心主旨很有必要，在速读的过程中，应尽可能多地捕获信息材料．其次，细读题材，各个击破．掌握全文的大意之后，细细阅读每篇材料后的问题，弄清每题要求后，带着问题，再回到原文中去寻找、捕获有关信息．最后，要善于抓住每段的主题句，阅读时，要有较强的针对性．对于捕获到的信息，要做认真分析，仔细推敲，理解透彻，只有这样，针对题目要求，才能做到稳、准．
