共用题干A Record-Breaking RoverNASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.“This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet. What does John Callas say about Opportunity's long distance travel?A: It hasn't met scientists' expectation yetB: It hasn't been appreciated appropriatelyC: It is secondary to what has been discoveredD:.It is what scientists have been aiming at
共用题干
A Record-Breaking Rover
NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.
“This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.
He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”
The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.
Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.
During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.
The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.
Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet.
A Record-Breaking Rover
NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.
“This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.
He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”
The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.
Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.
During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.
The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.
Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet.
What does John Callas say about Opportunity's long distance travel?
A: It hasn't met scientists' expectation yet
B: It hasn't been appreciated appropriately
C: It is secondary to what has been discovered
D:.It is what scientists have been aiming at
A: It hasn't met scientists' expectation yet
B: It hasn't been appreciated appropriately
C: It is secondary to what has been discovered
D:.It is what scientists have been aiming at
参考解析
解析：根据第一段“NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance.”可知，“机遇号”比任何漫游车行驶的距离都长。故选B。
从第二、三段可知，“机遇号”并不是为长途行驶而设计的，它本来预定只能行驶大约一千米。因此“机遇号”在被设计时，约翰并没有准确地知道它的价值。故本题选 B。
由第四段“The objective of the rovers was to help scientists learn more about the planet and to search for signs of life , such as the possible presence of water.”可知，把“机遇号”和 “勇气号”送上火星的目的之一是寻找生命的迹象。故本题选D。
根据文章最后两段可知，如果“机遇号”继续行驶的话，在它行驶到26.2英里的时候，它就会到达另一个重要的研究场地——马拉松谷，因此C项正确。倒数第二段第一句说，“机遇号”不会止步于此，故A项错误。B、D项文中并未提到。
由最后一段可知，“机遇号”接下来的工作能够帮助研究人员实施人类最终登陆火星的计划。故B项“科学家正努力把更多的人类送上火星”是正确答案。
从第二、三段可知，“机遇号”并不是为长途行驶而设计的，它本来预定只能行驶大约一千米。因此“机遇号”在被设计时，约翰并没有准确地知道它的价值。故本题选 B。
由第四段“The objective of the rovers was to help scientists learn more about the planet and to search for signs of life , such as the possible presence of water.”可知，把“机遇号”和 “勇气号”送上火星的目的之一是寻找生命的迹象。故本题选D。
根据文章最后两段可知，如果“机遇号”继续行驶的话，在它行驶到26.2英里的时候，它就会到达另一个重要的研究场地——马拉松谷，因此C项正确。倒数第二段第一句说，“机遇号”不会止步于此，故A项错误。B、D项文中并未提到。
由最后一段可知，“机遇号”接下来的工作能够帮助研究人员实施人类最终登陆火星的计划。故B项“科学家正努力把更多的人类送上火星”是正确答案。