1．Thirteen vehicles lined up last March to race across the Mojave Desert，seeking a million in prize money．To win，they had to finish the 142-mile race in less than 10hours．Teams and watchers knew there might be no winner at all，because these vehicles were missing a key part-drivers．
DARPA，the Defense Advanced Research Projects Agency，organized the race as part of a push to develop robotic vehicles for future battlefields．But the Grand Challenge，as it was called，just proved how difficult it is to get a car to speed across an unfamiliar desert without human guidance．One had its brake lock up in the starting area，Another began by throwing itself onto a wall．Another got tied up by bushes near the road after 1.9miles．
One turned upside down．One took off in entirely the wrong direction and had to be disabled by remote （远距离的） consol．One went a little more than a mile and rushed into a fence； another managed to go for six miles but stuck on a rock．The"winner，"if there was any，reached 7.8miles before it ran into a long，narrow hole，and the front wheels caught on fire．
"You get a lot of respect for natural abilities of the living things，"says Reinhold Behringer，who helped design two of the ear-size vehicles for a company called Sci-Autonics，"Even ants （蚂蚁） can do all these tasks effortlessly．It's very hard for us to put these abilities into our machines．"
The robotic vehicles，though with necessary modern equipment such as advanced computers and GPS guidance，had trouble figuring out fast enough the blocks ahead that a two-year-old human recognizes immediately．Sure，that very young child，who has just only learned to walk，may not think to wipe apple juice off her face，but she already knows that when there's a cookie in the kitchen she has to climb up the table，and that when she gets to the cookie it will taste good．She is more advanced，even months old，than any machine humans have designed．
68．DARPA organized the race in order toD．
A．raise money for producing more robotic vehicles
B．push the development of vehicle industry
C．train more people to drive in the desert
D．improve the vehicles for future wars
69．From the passage we know"robotic vehicles"are a kind of machines thatD．
A．can do effortlessly whatever tasks living things can
B．can take part in a race across 142miles with a time limit
C．can show off their ability to turn themselves upside down
D．can move from place to p1ace without being driven by human beings
70．In the race，the greatest distance one robotic vehicle covered wasA．
A．about eight miles B．six miles C．almost two miles D．about one mile
71．In the last paragraph，the writer implies that there is a long way to goC．
A．for a robotic vehicle to finish a 142-mile race without any difficulties
B．for a little child who has just learned to walk to reach the cookie on the table
C．for a robotic vehicle to deal with a simple problem that a little child can solve
D．for a little child to understand the importance of wiping apple juice off its face．
分析 本文为科技说明文，文章为我们介绍了机器人车，包括其性能、装备、用途等．
解答 68---71 DDAC
68．答案D．细节题：从ARPA，the DefenseAdvanced Research Projects Agency，organized the race as part of a push to develop robotic vehicles for future battle fields．可以看出，DARPA举行这场竞赛是为推动未来战场上机器人车的发展．故选D．
69．答案D．细节题：how difficult it isto get a car to speed across an unfamiliar desert without human guidance可以看出这种机器无需人的驾驶和指引．故选D．
70．答案A．细节题：从The"winner，"ifthere was any，reached 7.8 miles before it ran into a long，narrow hole，andthe front wheels caught on fire可知，机器人车可覆盖的距离大约为8公里．故选A．
71．答案C．推断题：从最后几句Sure，thatvery young child，who has just only learned to walk，may not think to wipeapple juice off her face，but she already knows that when there's a cookie inthe kitchen she has to climb up the table，and that when she gets to the cookieit will taste gook．She is more advanced，even months old，than any machinehumans have designed．可知，机器人车还由很长的路要走，因为它现在只能解决简单的问题，这些问题小孩子也可以解决．答案为C．
点评 答题策略如下：
1、先题后文：
先读试题，了解考点；明确目的，快速捕捉，获取信息．
2、题干定向：
根据题干关键词到文中定位答案范围，按照题目顺序依次而下：问题与材料相同：对号入座；问题与原文相同：同义替换、归纳事实等．
