题目内容
2.Are we humans alone in space?Scientists have been working on this question for a long time.And recently,new (16)A offer more hope that some form of life was on Mars in the past and perhaps is still there(17)B.According to a new report in the book Science,the Mars Explorer Curiosity has found more methane(甲烷) in (18)D air.It might suggest the possibility of life.
During the last 20months,Curiosity has found methane many times,and four of them,it tested at a level 10times (19)C than usual."It's a great increase,"said Christopher Webster,the lead scientist.
This new finding has made a big change.In September 2013,Curiosity found almost(20)B sign of methane on Mars.Just weeks later,however,Curiosity (21)A the gas.
If there's methane in Mars'air,where is it coming from?Scientists aren't sure.Methane is also found in Earth's air and comes from animal and plant life,as well as from the environment(22)D.
"There are many(23)A sources(来源),such as actions between water and rock,"guessed Sushil,a scientist of the Curiosity team.
Also,for the first time,Curiosity found some other organisms(有机物) in the rocks of Mars.Organisms are thought to be the necessary things to form life.Scientists aren't sure where these organisms come from.They could have formed on Mars (24)D landed on Mars by meteorites.
For the next three years,Curiosity will (25)C looking for more organisms in rocks and exploring Mars.There is still a long way to go!
| 16.A.discoveries | B.inventions | C.books | D.magazines |
| 17.A.in time | B.at present | C.at once | D.in future |
| 18.A.Earth's | B.Sun's | C.Moon's | D.Mars' |
| 19.A.high | B.low | C.higher | D.lower |
| 20.A.all | B.no | C.every | D.much |
| 21.A.picked up | B.put up | C.gave up | D.opened up |
| 22.A.himself | B.themselves | C.herself | D.itself |
| 23.A.possible | B.necessary | C.certain | D.important |
| 24.A.and | B.but | C.so | D.or |
| 25.A.stop | B.practice | C.keep | D.remember. |
分析 文章大意:我们人类在太空中是单独存在的吗?科学家们很久之前就一直在研究这个问题.最近,新的发现提供了更多的希望,在火星上过去存在某种形式的生命,也许目前依然存在.在接下来的三年里,好奇号将继续在岩石中寻找更多的有机物并探索火星.
解答 16-20ABDCB 21-25ADADC
16题答案:A考查名词辨析.discoveries 意为发现;inventions意为发明;books意为书;magazines意为杂志; 根据offer more hope that some form of life was on Mars 提供更多的希望,某种形式的生活在火星上可知应该是新的发现,故答案是A.
17题答案:B考查副词辨析.in time意为及时at present 意为目前;现在;at once 意为马上;in future 意为将来,根据文中And recently,new discoveries offer more hope that some form of life existed on Mars in the past,and perhaps is still there…可知最近,新的发现提供了更多的希望,某种形式的生命在过去存在于火星上,推知也许现在仍然存在.故答案是B.
18题答案:D考查名词辨析.根据文中的the Mars Explorer Curiosity has found more methane火星探险家好奇号发现更多的甲烷,应该是在火星上,故答案是D.
19题答案:C考查形容词辨析.根据文中的It's a great increase这是一个巨大的增长,than要用比较级,是更高,故答案是C.
20题答案:B考查名词辨析.根据文中的This new finding has made a big change.这个新发现发生了巨大变化.可知在2013年9月应该是火星上几乎没有发现甲烷的迹象,故答案是B.
21题答案:A考查动词辨析.picked up意为捡起来;put up 意为提供;gave up意为放弃;opened up意为打开; 根据文中的Just weeks later,however,Curiosity 几周之后,好奇号火星应该是捡起了,故答案是A.
22题答案:D考查反身代词辨析.根据文中的as well as from the environment,反身代词是 the environment,故用itself,故答案是D.
23题答案:A考查形容词辨析.possible意为可能的;necessary意为必要的;certain 意为某一;必然的;important 意为重要的;根据文中的such as actions between water and rock如水和岩石之间的运动可知是猜测,故用possible,故答案是A.
24题答案:D考查连词辨析.and 意为和;but 意为但是;so 意为所以;or意为或者; 根据文中的They could have formed on Mars (24)landed on Mars by meteorites.应该是它们可能是在火星上形成的,也可能是陨石落在火星上带来的.表示或者,故答案是D.
25题答案:C考查动词辨析.stop意为停止;practice意为练习;keep 意为保持,继续;remember意为记住; 根据文中的Curiosity will (25)looking for more organisms in rocks and exploring Mars可知应该是好奇号将继续在岩石中寻找更多的有机物并探索火星,故答案是C.
点评 本文是一篇科普类文章.讲述的是人类对火星的探索.做题时要在理解好文意的基础上,与题目有机的结合,从文章中找到相关细节性的句子与选项细细比对,进行选择或推理判断,选出符合文章内容的正确选项.做题注意灵活,有时可采用排除法或直选法确定出最终答案.
| A. | other | B. | another | C. | the other | D. | others |
| A. | make,to keep | B. | to make,to keep | C. | to make,keep | D. | make,keep |