四六级

　　在四级考试中，听力是考生最不好把握的一个部分了，许多考生没能通关很大一部分原因就是听力拖了后腿。以下是小编为大家准备的听力考前冲刺练习，因为在练习中熟练技巧，总结经验才是最好的方法。

 英语四级听力冲刺练习27

　　23.

　　[A] The possible existence of life on otherplanets.

　　[B] Methods for building powerful newtelescopes.

　　[C] A technical problem that astronomerscan’t solve.

　　[D] The discovery of planets orbitingdistant stars.

　　24.

　　[A] They studied variations in theappearance of the parent stars.

　　[B] They were able to see the planets witha telescope.

　　[C] They compared the parent stars to theSun.

　　[D] They sent astronauts on a mission intospace.

　　25.

　　[A] Their surface features.

　　[B] Their chemical composition.

　　[C] Their temperature.

　　[D]Their age.

　　听力对话答案：

　　23.D综合推断题。女士一开始就介绍说科学团体首次确定了太阳系以外的行星的存在，虽然人类知道存在着某些遥远的恒星，但却是最近才得知有些恒星有围绕自己运行的行星，接下来的对话也是围绕这些行星展开的，故选D。

　　24.A综合推断题。女士说天文学家是通过间接方法来发现那些行星的，他们测量出母星发出的光频的细微变化，还观察到母星似乎前后摆动，最终确定这都是由于沿轨道运行的行星的牵引而引起的，由此推断，科学家们是通过研究母星外观的变化来确定行星的存在的，故选A。

　　25.B信息明示题。女士说科学家们可以利用新的望远镜来分解、分析光线，进而希望了解这些行星的化学成分，故选B。

　　听力原文：

　　M: Doctor Cole, thank you for agreeing tothis interview for the Daily Campus News. Can you tell us about what you andyour colleagues discuss at the annual astronomy society meeting last month?

　　W: Yes. For the first time ever thescientific community has established the existence of planets outside our ownsolar system. Of course we knew that certain distant stars existed, but onlyrecently did we learn that several of them are orbited by their own planets.

　　M: Why did it take so long to locate theseplanets?

　　W: Well, you have to understand that theyare a billion times dimmer than their parent stars. It would be like trying tosee the light of a candle next to a huge explosion. We don’t currently have atelescope that can be used to see them.

　　M: But if the astronomers didn’t see theplanets through a telescope, how did they find them?

　　W: By a very indirect method. The astronomersmeasured subtle distortions in the frequency of the light from the parent starsand observed that some of the stars seem to rock back and forth. Theydetermined that this was caused by gravitational pull from orbiting planets.

　　M: There is a powerful new telescope beingbuilt in Arizona. Will that help them see these planets?

　　W: They should be able to see them at leastin the form of small spots of light. And then the scientists will be able tobreak down and analyze this light. By doing this, they hope to learn about thechemical composition of these planets-oxygen and ozone molecules, for example,would be telltale signs of life on these planets.

　　M: I’m looking forward to hearing more whenthe telescope is in operation. And I’m sure our readers would be interestedtoo.

　　Questions 23 to 25 are based on theconversation you have just heard.

　　23. What is the conversation mainly about?

　　24. How did the scientists establish theexistence of the planets?

　　25.What does the professor say the scientists might learn about the planets byusing the new telescope?

         以上就是小编为大家提供的四级听力冲刺训练，大家快来练习吧！四六级备考正值冲刺阶段，文都网校为大家推出了2017年6月四六级考前冲刺备考专题，希望能帮助到大家！