1．Washington：NASA has announced evidence that Jupiter's largest moon，Ganymede，has a saltwater ocean under its icy surface．The ocean seems to have more water than all the water on Earth's surface，according to new Hubble observation．
New Hubble observations of Ganymede's magnetic field strongly suggest that the moon，which is the largest in our whole solar system，is home to a subsurface ocean．
Scientists estimate the ocean is 95kilometres thick，which is about 10times deeper than Earth's oceans．But unlike our salty waters，Ganymede's ocean is buried under 150kilometres of ice．
While scientists have speculated（推測(cè)） since 1970s about the presence of an ocean on Ganymede------the largest moon in our solar system------until now the only observational evidence came from a brief flyby by the Galileo spacecraft，which didn't observe the moon long enough to confirm a liquid ocean．
This discovery marks an important milestone，highlighting what only Hubble can accomplished．In its 25years in orbit，Hubble has made many scientific discoveries in our own solar system．A deep ocean under the icy surface of Ganymede opens up further exciting possibilities for life beyond Earth．
Scientists have already confirmed the existence of an ocean on Europa，another moon orbiting Jupiter，and NASA has announced plans to send an unmanned mission there searching for the life that might come with liquid water．
Hubble is a telescope that orbits Earth，but because of its impressive gravitational analyses it can be used to study the inside of far distant planets．Using these same principles，scientists could theoretically detect oceans on distant planets as well．

28．What can we learn about the Ganymede from the passageB？
A．It is a planet with the largest moon in our whole solar system．
B．Its ocean adds to people's excitement about life beyond Earth．
C．It will be used by NASA as a base for the Hubble telescope．
D．Its liquid ocean was first proved by the Galileo spacecraft．
29．Which of the following best describes the writer's attitude towards HubbleD？
A．Cautious
B．Doubtful
C．Negative
D．Favourable
30．What does the underlined part in Paragraph 6 meanC？
A．An underground ocean has been found in Europe．
B．The presence of an underground ocean in Europe is not possible．
C．It is now certain that there is an ocean ion Europe．
D．No evidence has shown the existence of an ocean on Europe．
31．What type of writing does this passage belong toB？
A．A term essay                           
B．A news report
C．An experiment report               
D．An exploration review．

分析 本文是一篇新聞報(bào)道． NASA證實(shí)木星的最大衛(wèi)星Ganymede上有海洋，這一發(fā)現(xiàn)再次拓寬了科學(xué)家的視野，使探尋太陽(yáng)系內(nèi)地球以外的生命的努力更進(jìn)一步．

解答 BDCB
28：B  細(xì)節(jié)題．由第五段最后一句"A deep ocean under the icy surface of Ganymede opens up further exciting possibilities for life beyond Earth．"可知，Ganymede 上的深海增加了人們對(duì)于地球以外存在生命的可能性的期待，故B項(xiàng)正確．A項(xiàng)，"Ganymede 這顆行星有著太陽(yáng)系中最大的衛(wèi)星"，由第一段第一句"NASA has announced evidence that Jupiter's largest moon，Ganymede…"可知，Ganymede 本身是木星的衛(wèi)星，并不是行星，故A項(xiàng)錯(cuò)誤；C項(xiàng)，"美國(guó)宇航局會(huì)將 Ganymede 設(shè)立為哈勃望遠(yuǎn)鏡基地"，全文未提及，故C項(xiàng)錯(cuò)誤；D項(xiàng)，"Ganymede 上液態(tài)海洋的存在是由伽利略太空船首次證明的"，由第四段最后的"…the only observational evidence came from a brief flyby by the Galileo spacecraft，which didn't observe the moon long enough to confirm a liquid ocean"可知，伽利略太空船所采集的證據(jù)，并不能有效證明 Ganymede 上液態(tài)海洋的存在，故D項(xiàng)錯(cuò)誤．故正確答案為B．
29：D   推斷題．結(jié)合第五段第一句"This discovery marks an important milestone，highlighting what only Hubble can accomplished．"可知，作者認(rèn)為是一個(gè)里程碑式的發(fā)現(xiàn)，而這一發(fā)現(xiàn)突顯了哈勃望遠(yuǎn)鏡能達(dá)到的程度，并且只有哈勃望遠(yuǎn)鏡能達(dá)到這種程度，故可推知作者對(duì)哈勃望遠(yuǎn)鏡的態(tài)度是贊許的（Favourable）．cautious 意為"小心謹(jǐn)慎的"，doubtful 意為"懷疑的"，negative 意為"否定的，消極的"，均不符合文意．故正確答案為D．
30：C   推斷題．結(jié)合劃線(xiàn)句下文"…NASA has announced plans to send an unmanned mission there searching for the life that might come with liquid water．"可知，NASA 計(jì)劃發(fā)送無(wú)人飛行器去尋找水源可能帶來(lái)的生命體，故科學(xué)家應(yīng)該是確認(rèn)了 Europa 這個(gè)星球上有水，NASA 才會(huì)派機(jī)勘察生命，C項(xiàng)正確．A項(xiàng)"在歐洲發(fā)現(xiàn)地下海洋"，B項(xiàng)"歐洲有地下海洋是不可能的"，句子描述的是 Europa 這個(gè)星球，與歐洲無(wú)關(guān)，故A、B項(xiàng)錯(cuò)誤．D項(xiàng)"沒(méi)有證據(jù)表明 Europa 星球上有海洋存在"不符合下文文意，故錯(cuò)誤．故正確答案為C．
31：B   推斷題．通讀全文可知，本文從第三者的角度，對(duì)美國(guó)國(guó)家宇航局對(duì)于 Ganymede 衛(wèi)星上存在海洋的新發(fā)現(xiàn)進(jìn)行了客觀的報(bào)道．再結(jié)合全文開(kāi)頭的"Washington"和第一段內(nèi)容可知，第一段是對(duì)全文內(nèi)容的高度概括，屬于新聞的導(dǎo)語(yǔ)，Washington 是新聞的發(fā)出地，即"華盛頓電"．由此可推斷本文為一篇新聞報(bào)道，故B項(xiàng)正確．A項(xiàng)"一篇學(xué)期論文"，C項(xiàng)"一份實(shí)驗(yàn)報(bào)告"，D項(xiàng)"一篇探測(cè)的回顧"，均不符．故正確答案為B．

點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．

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