Question

20．A planet more like Earth than any yet discovered has been identified as a potential future home for mankind．Kepler 22b contains both land and water and has temperatures which average around 72 degrees （22 Celsius）．It also contains the right atmosphere to potentially support life．It is，however，600 light years from Earth．
The planet，where a year lasts 290 days，was first spotted two years ago．However，NASA scientists using the agency's Kepler space telescope have now concluded that it offers the best hope for future human habitation outside the Solar System．
One of the key factors for a planet to be habitable is that it remains about the right distance from its main star to be neither too cold nor too hot．
Bill Borucki，Kepler principal investigator at NASA Research Centre，said，"We are certain that it is in the habitable zone and if it has a surface it ought to have a nice temperature．
There are now three planets outside the system，known as exoplanets，which experts believe could potentially be occupied by future generations．

68．Which of the following is most likely to support life for a planet？D
    A．It has 290 days in a year．
    B．It contains both water and land and the right atmosphere．
    C．Its temperatures average 72 degrees （22 Celsius）．
    D．It remains proper distance from its star to have a nice temperature．
69．What does the new planet have in common with the earth？A
    A．They are habitable for mankind．
    B．They exist in the Solar System．
    C．They have almost the same days in a year．
    D．They are both 600 light years from the sun．
70．The passage is written to make it known to readers thatB．
    A．there are now three more planets inside the system
    B．NASA's Kepler space telescope finds a"new Earth"
    C．Bill Borucki has confirmed his investigation
    D．it has been two years since a new planet was spotted．

Answer 1

分析 本文為科教類說(shuō)明文，文章主要介紹了新發(fā)現(xiàn)的與地球非常相似、適合于人類居住的星球開(kāi)普勒-22b22b．這座星球在太陽(yáng)系之外，離地球大約600光年；因?yàn)殡x主要恒星的距離適當(dāng)，所以它的氣溫不太高也不太低；它一年有290天；系統(tǒng)外有3 個(gè)系外行星，專家認(rèn)為將來(lái)可能會(huì)成為人類居住的地方．

解答 68．答案是D．細(xì)節(jié)理解題；由第三段"One of the key factors for a planet to be habitable is that it remains about the right distance from its main star to be neither too cold nor too hot．"可知，宜居的一個(gè)關(guān)鍵因素是與他的主要恒星保持適當(dāng)?shù)木嚯x，這樣就不會(huì)太冷或太熱，故選D．
69．答案是A．細(xì)節(jié)理解題；由文章第一句"A planet more like Earth than any yet discovered has been identified as a potential future home for mankind．"可知，這個(gè)星球比以往發(fā)現(xiàn)的任何星球更像地球，能夠成為將來(lái)人類的家園，由此判斷選A．由第二段的"it offers the best hope for future human habitation outside the Solar System．"可知，它為未來(lái)人類在太陽(yáng)系以外居住提供了希望，故判斷它不屬于太陽(yáng)系，排除B；由第二段第一句中"a year lasts 290 days"判斷C錯(cuò)誤；第一段的最后一句"It is，however，600 light years from Earth．"可知開(kāi)普勒-22b22b離地球600光年，排除D．
70．答案是B．主旨大意題；文章主要介紹了新發(fā)現(xiàn)的與地球非常相似、適合于人類居住的星球開(kāi)普勒-22b22b，故選B．

點(diǎn)評(píng) 閱讀要在整體理解文章的基礎(chǔ)上，根據(jù)題干中關(guān)鍵詞定位細(xì)節(jié)，然后對(duì)照選項(xiàng)做出合理的判斷．如果是主旨大意的判斷要把握文章整體，避免以偏概全．