18．Even as Google plans to test its fleet（車隊(duì)）of self-driving cars on public roads this summer，its business model remains a bit of a mystery．By 2025，as many as 250，000self-driving vehicles could be sold each year globally，according to a study by an industry research firm．
"Vehicles that can take anyone from A to B at the push of a button could transform mobility for millions of people，"said Chris Urmson，director of Google's self-driving car project．For now，Google has no plans to sell any of its self-driving cars．They are strictly for research．But they will hit public roads this summer near Google's headquarters in Mountain View，California．Previous testing has taken place only on closed courses．
The cars are built to operate without a steering wheel，accelerator（油門）or brake pedal．"Our software and sensors do all the work，"Urmson said．"The vehicles will be very basic-we want to learn from them and adapt them as quickly as possible-but they will take you where you want to go at the push of a button．"The prototype（雛形）are the first of a 100-car fleet the tech giant is building．
In the long run，Urmson sees a future of safer roads-the majority of auto accidents are caused by human error-and fewer traffic jams．Robotic cars could also shuttle people who can't drive because of age or illness．
Google has said that self-driving cars could launch new business models in which people buy the use of vehicles they don't own．The company has already tested other types of self-driving cars on public streets，including modified Lexus sport-utility vehicles，under a special permit program by the California Department of Motor Vehicles that requires a human driver at the controls．
The state has issued six other companies permits to operate such cars，including Delphi，Mercedes-Benz，Volkswagen，Tesla，Bosch and Nissan．The vehicles that will be tested on open roads this summer will have removable steering wheels，accelerators and brake pedals to allow"safety drivers"to take control if needed．
Google says the cars are safe．The vehicles have sensors that"can detect objects out to a distance of more than two football fields in all directions，which is especially helpful on busy streets with lots of intersections，"Urmson said．"We're looking forward to learning how the community understands and interacts with the vehicles，and to uncovering challenges that are unique to a fully self-driving vehicle，"Urmson said．

28．The passage informs us that self-driving carsA．
A．will probably decrease traffic jams
B．have already passed necessary tests
C．have been purchased by some companies
D．will be able to communicate with drivers
29．According to Chris Urmson，A．
A．software and sensors are vital for self-driving cars
B．self-driving cars can give driving orders to humans
C．self-driving cars are specially designed for the elderly
D．ordinary vehicles will be replaced by self-driving cars
30．The underlined word"intersections"in the last paragraph probably meansC．
A．a(chǎn)ccidents      B．buildings      C．crossings      D．vehicles
31．What is the best title for this passage？D
A．Self-driving Car Avoids Human Errors
B．Self-driving Car Meets New Challenges
C．Google's Self-driving Car Enjoys Global Popularity
D．Google's Self-driving Car Graduates to City Streets．

分析 本文主要是介紹了有關(guān)谷歌生產(chǎn)的自主駕駛汽車正逐漸成熟的相關(guān)信息．

解答 28．A 細(xì)節(jié)理解題．據(jù)第四段In the long run，Urmson sees a future of safer roads---the majority of auto accidents are caused by human error---and fewer traffic jams．可知自主駕駛汽車更安全，并有助于減少交通堵塞．故選A．
 29．A 細(xì)節(jié)理解題．根據(jù)第三段"Our software and sensors do all the work，"Urmson said．可知感應(yīng)器和軟件是自主駕駛汽車的核心．故選A．
30．C 詞義猜測(cè)題．根據(jù)最后一段可知自主駕駛汽車的感應(yīng)器對(duì)于擁有眾多路口的繁忙的道路有很大的幫助．intersection十字路口．故選C．
31．D 標(biāo)題歸納題．本文主要是介紹了有關(guān)谷歌生產(chǎn)的自主駕駛汽車正逐漸成熟的相關(guān)信息．故可知選D．

點(diǎn)評(píng) 閱讀理解題測(cè)試考生在閱讀基礎(chǔ)上的邏輯推理能力，要求考生根據(jù)文章所述事件的邏輯關(guān)系，對(duì)未說明的趨勢(shì)或結(jié)局作出合理的推斷；或根據(jù)作者所闡述的觀點(diǎn)理論，對(duì)文章未涉及的現(xiàn)象、事例給以解釋．考生首先要仔細(xì)閱讀短文，完整了解信息，準(zhǔn)確把握作者觀點(diǎn)．

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