聽力對(duì)話試題

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

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.

來源:可可英語 http://www.ccdyzl.cn/cet4/201409/320593.shtml