2.For a long time,humans have used technology (科技) to study the world around us,and Mars is the latest place we're using machines to explore.Besides the earth,the"red planet"is seen,as the one place in our solar system most likely to have life.
Early last month,the first American robot,Spirit,landed on Mars without any problem.Opportunity,the second robot,landed on the planet more than a week ago.Scientists are very excited about these machines'safe landing on Mars.It means that now we have an excellent chance to look for water and other signs of life.So far,the robots have found some stones that could show Mars was once a wet and warm planet.
But the trips made by Spirit and Opportunity were dangerous.Mars is often called the"death planet",because in the past its environment has been unfriendly to the robot explorers.Before Spirit and Opportunity,nearly forty spaceships had been sent to Mars since the 1960s.Two-thirds of them failed.The first spaceship,Korabl,sent in 1962by Russia was among them.It broke apart (分裂) near the earth.
28.For a long time humans thinkB.
A.they can surely find life on Mars
B.there may be life on Mars
C.it's too late for them to explore Mars now
D.Mars is the only planet that has life on it
29.The two robotsC.
A.have found out that it is warm and wet on Mars
B.were sent to Mars to find some stones
C.were the first two American robots that landed on Mars
D.are the only machines that have landed on Mars so far
30.The third paragraph mainly tell usA.
A.it's a very hard and dangerous trip for spaceships to Mars
B.two-thirds of the spaceships sent to Mars have failed
C.Spirit and Opportunity landed on Mars successful
D.Mars is called the"death planet"
分析 短文主要讲了人类对我们周围的空间进行勘测.除了地球之外,"红色星球"被视为太阳系中最有可能有生命的地方.美国第一机器人和第二机器人,相继登上了火星,但火星之旅很危险.火星通常被称为"死亡之星".
解答 答案:28.B 细节理解题.根据第一段第一行句子For a long time,humans have used technology (科技) to study the world around us,and Mars is the latest place as the one place in our solar system most likely to have life.很长一段时间以来,人类都用科技来研究我们周围的世界,火星是最有可能有生命的太阳系的一个地方.故选B.
29.C 细节理解题.根据第二段第一行句子Scientists are very excited about these machines'safe landing on Mars.科学家们对这些美国机器人成功登陆火星很兴奋.故C.
30.A 细节归纳题.根据第三段第一行句子But the trips made by Spirit and Opportunity were dangerous.但由火星探测漫游者制造的旅行是危险的.及整个第三段的内容可知主要讲述了这两个机器人在火星上的旅行是危险的.故选A.
点评 在通读全文的基础上,根据全文大意,展开逻辑思维,瞻前顾后,认真观察选项,仔细推敲,确定最佳答案.