Washington：NASAhasannouncedevidencethatJupiter'slargestmoon，Ganymede，hasasaltwateroceanunderitsicysurface．TheoceanseemstohavemorewaterthanallthewateronEarth'ssurface，accordingtonewHubbleobservation．NewHubbl

Question

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（推测） 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 passage___？
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 Hubble___？
A．Cautious
B．Doubtful
C．Negative
D．Favourable
30．What does the underlined part in Paragraph 6 mean___？
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 to___？
A．A term essay                           
B．A news report
C．An experiment report               
D．An exploration review．

Answer 1

BDCB
28：B  细节题．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 上的深海增加了人们对于地球以外存在生命的可能性的期待，故B项正确．A项，"Ganymede 这颗行星有着太阳系中最大的卫星"，由第一段第一句"NASA has announced evidence that Jupiter's largest moon，Ganymede…"可知，Ganymede 本身是木星的卫星，并不是行星，故A项错误；C项，"美国宇航局会将 Ganymede 设立为哈勃望远镜基地"，全文未提及，故C项错误；D项，"Ganymede 上液态海洋的存在是由伽利略太空船首次证明的"，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证据，并不能有效证明 Ganymede 上液态海洋的存在，故D项错误．故正确答案为B．
29：D   推断题．结合第五段第一句"This discovery marks an important milestone，highlighting what only Hubble can accomplished．"可知，作者认为是一个里程碑式的发现，而这一发现突显了哈勃望远镜能达到的程度，并且只有哈勃望远镜能达到这种程度，故可推知作者对哈勃望远镜的态度是赞许的（Favourable）．cautious 意为"小心谨慎的"，doubtful 意为"怀疑的"，negative 意为"否定的，消极的"，均不符合文意．故正确答案为D．
30：C   推断题．结合划线句下文"…NASA has announced plans to send an unmanned mission there searching for the life that might come with liquid water．"可知，NASA 计划发送无人飞行器去寻找水源可能带来的生命体，故科学家应该是确认了 Europa 这个星球上有水，NASA 才会派机勘察生命，C项正确．A项"在欧洲发现地下海洋"，B项"欧洲有地下海洋是不可能的"，句子描述的是 Europa 这个星球，与欧洲无关，故A、B项错误．D项"没有证据表明 Europa 星球上有海洋存在"不符合下文文意，故错误．故正确答案为C．
31：B   推断题．通读全文可知，本文从第三者的角度，对美国国家宇航局对于 Ganymede 卫星上存在海洋的新发现进行了客观的报道．再结合全文开头的"Washington"和第一段内容可知，第一段是对全文内容的高度概括，属于新闻的导语，Washington 是新闻的发出地，即"华盛顿电"．由此可推断本文为一篇新闻报道，故B项正确．A项"一篇学期论文"，C项"一份实验报告"，D项"一篇探测的回顾"，均不符．故正确答案为B．