2．We humans are imperfect beings tending to make mistakes and basic errors of judgment．So we create technologies to help ourselves out．
Take the self-driving cars for example．The belief here is that the technology will improve safety．But this is a very bold assumption to make at this stage in its development，as the evidence to support the view simply is not there yet．The best data we have comes from tests conc1ucted over the course of 2016in California，a state which，it must be remembered，has a mild climate hardly representing global driving conditions．
Google's Waymo scored best，with one human intervention（介入）every 5，127 miles driven．This was an improvement on the year before，but nowhere near perfect．In all，Waymo's 60 testing vehicles drove about 10，597 miles in 2016-3，000 miles less than the annual US average per vehicle．Tesla performed much worse．The electric vehicle maker's four cars were tested on average 137 miles each that year，meeting with 45 human interventions per vehicle-or one roughly every three miles．Each Intervention represents an accident which was potentially avoided．
Given that most industry watchers believe the public will not tolerate any faults at all，none of this is encouraging．It is certainly true that the technology is improving．But it is also the case that self-driving cars have been around since the mid-1990s，with one vehicle achieving a 98.2 percent"autonomous driving percentage"even back then．
Even if the technical challenges can be overcome，unexpected negative externalities（外在因素）probably cannot．And we surely would not want to risk that when driving．
28．What does the underlined word"bold"in Paragraph 2mean？C
A．black
B．ridiculous
C．daring
D．perfect
29．What can we learn from the self-driving tests in Paragraph 3？A
A．Human interventions are unavoidable．
B．Waymo's cars could drive farther than Tesla's．
C．Electric vehicles need fewer human interventions．
D．Each intervention caused an accident．
30．What is the author's attitude to self-driving cars？B
A．It's unbearable．
B．It's sceptical．
C．It's very economical．
D．It's very encouraging．
31．What may be the best title for this passage？D
A．Can self-driving improve test skills？
B．Self-driving：Costly or not？
C．Can self-driving represent new technology？
D．Self-driving：Reliable or not？
分析 文章通過一些實際調(diào)查舉例講述了自駕車的發(fā)展，以及未來使用自駕車的有關(guān)討論．
解答 28．C 詞意猜測題．根據(jù)文章第二段第二句"But this is a very bold assumption to make at this stage in its development，as the evidence to support the view simply is not there yet"但是，這是一個非常大膽的假設(shè)，在這個階段的發(fā)展，因為證據(jù)支持這種觀點，只是還沒有，故這個單詞在這里的含義為大膽的．故選C．
29．A 細(xì)節(jié)理解題．根據(jù)文章第三段"Waymo's 60 testing vehicles drove about 10，597 miles in 2016-3，000 miles less than the annual US average per vehicle．Tesla performed much worse．The electric vehicle maker's four cars were tested on average 137 miles each that year，"Waymo的60個測試車輛比美國平均每輛車每年少2016-3000英里10597英里．特斯拉電動汽車的表現(xiàn)更為糟糕．制造商的四輛汽車平均137英里每一年的測試，可知B、C項不正確，"Each Intervention represents an accident which was potentially avoided．"每一次干預(yù)都是一次可能避免的事故，可知D項不正確．故選A．
30．B 細(xì)節(jié)理解題．根據(jù)最后一段"，unexpected negative externalities（外在因素）probably cannot．And we surely would not want to risk that when driving．"意料之外的負(fù)外部性可能無法去除，我們當(dāng)然不想在開車的時候冒這個險．故選B．
31．D 標(biāo)題概括題．文章通過一些實際調(diào)查舉例講述了自駕車的發(fā)展，以及未來使用自駕車的有關(guān)討論．結(jié)合選項標(biāo)題為Self-driving：Reliable or not？最佳．故選D．
點評 本文是一個科教類閱讀理解，題目涉及多道細(xì)節(jié)理解題，做題時結(jié)合原文和題目有針對性的找出相關(guān)語句進(jìn)行仔細(xì)分析，結(jié)合選項選出正確答案．推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案，切忌胡亂猜測，一定要做到有理有據(jù)．
