分析 本文是一篇說明文,主要講述了一個(gè)人同時(shí)從事多項(xiàng)活動(dòng)的工作效率問題,一些很好的大腦訓(xùn)練就涉及到讓大腦一次接受二個(gè)或更多個(gè)挑戰(zhàn).但很多時(shí)候,一心多用往往會(huì)降低而不是提高效率.研究表明,一心多用會(huì)導(dǎo)致壓力增加、焦慮和記憶力減退.研究還發(fā)現(xiàn),一心多用,與他們一次只做一件事情時(shí)相比,工作效率下降了.同時(shí)做兩件或多件需要留神的事情時(shí),人們往往會(huì)出錯(cuò).同時(shí)處理幾個(gè)細(xì)節(jié)問題時(shí),我們常會(huì)忘事.精神不集中,可能對(duì)新的信息注意力就不夠,于是這些新信息就根本沒貯存到記憶中去.
解答 49.A 推理判斷.根據(jù)第一段的內(nèi)容可知,作者提出:"In fact,some excellent mental aerobic exercises (大腦訓(xùn)練) involve engaging the brainin two or more challenging activities at a time.",之后用although引出轉(zhuǎn)折,這種訓(xùn)練有時(shí)并不能productive.所以選擇A.有部分人認(rèn)為這種大腦的訓(xùn)練能夠幫助他們高效的工作.
50.B 細(xì)節(jié)理解.根據(jù)"this front part of the brainactually takes a moment of rest between tasks",可以推斷出之后的"ifyou've ever dialed (撥電話) a phone number and suddenly forgotten who youdialed when the line is answered"的情況,所以選擇B.
51.A 細(xì)節(jié)理解.根據(jù)第三段內(nèi)容,特別是最后一句話可知當(dāng)人在同時(shí)從事兩項(xiàng)或多項(xiàng)需要花費(fèi)精力的工作時(shí),常常會(huì)出錯(cuò).故選擇A.
52.B 主旨大意.最后一段中作者繼續(xù)描述了之前的觀點(diǎn):一個(gè)人同時(shí)從事多項(xiàng)工作會(huì)出現(xiàn)很多問題.回到整篇文章,作者主要觀點(diǎn)就是告訴大家:多項(xiàng)工作不能產(chǎn)生高效的結(jié)果,故選擇B.
點(diǎn)評(píng) 解答細(xì)節(jié)理解題時(shí),一個(gè)常用的方法就是運(yùn)用定位法,即根據(jù)題干和選項(xiàng)中的關(guān)鍵詞從原文中找到相關(guān)的句子,與選項(xiàng)進(jìn)行比較從而確定答案;推理判斷題既要求學(xué)生透過文章表面文字信息推測(cè)文章隱含意思,又要求學(xué)生對(duì)作者的態(tài)度、意圖及文章細(xì)節(jié)的發(fā)展作正確的推理判斷,力求從作者的角度去考慮,不要固守自己的看法或觀點(diǎn).
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