Passage 1

　　【語(yǔ)篇導(dǎo)讀】本文是說(shuō)明文,主要介紹了氣候變暖對(duì)生活在南極地區(qū)的海豹的影響,

　　1.What does the author regard climate changes for seals as?

　　A.A double-edged sword.

　　B.An unavoidable disaster for existence.

　　C.A mirror of evolution.

　　D.A requirement for more choice in the gene pool.

　　答案　A

　　解析　推理判斷題。文章第一至三段介紹了氣候變暖對(duì)南極地區(qū)海豹的負(fù)面影響,第四、五段介紹了氣候變暖對(duì)其他海豹種類的正面影響。由此可知,在作者看來(lái),對(duì)海豹來(lái)說(shuō),氣候變暖有利有弊,是把雙刃劍。

　　2.What will happen to the seals in warmer climates?

　　A.Their number will be on the increase.

　　B.The female seals will be in the lead.

　　C.Their genes will change a great deal.

　　D.The females will keep away from the males.

　　答案　A

　　解析　細(xì)節(jié)理解題。根據(jù)第四段中的“...those living in warmer climates are producing more young due to the changes.”可知,生活在較溫暖地區(qū)的海豹會(huì)因?yàn)樘鞖庾兣�而繁殖更多的幼崽。由此可�?它們的數(shù)量會(huì)增加。

　　3.Which of the following can be the best title for the text?

　　A.The Importance of Protecting Seals

　　B.Seals’ Adaptation to Climate Change

　　C.How Climate Change Affects Seals

　　D.Why Are Seals Becoming Less and Less

　　答案　C

　　解析　主旨大意題。根據(jù)全文可知,介紹了氣候變暖對(duì)生活在不同地區(qū)的海豹的負(fù)面影響和正面影響,因此C項(xiàng)“氣候變化如何影響海豹”作本文標(biāo)題最佳。

Passage 2

　　【語(yǔ)篇導(dǎo)讀】為什么飛行員在起飛和降落的過(guò)程中使燈光變暗?本文給出了解釋。

　　1.The lights are dimmed before takeoff to help passengers 　　　.

　　A.take a short break

　　B.escape in time of emergency

　　C.create a warm atmosphere

　　D.adapt their eyes to the bright environment

　　答案　B

　　解析　細(xì)節(jié)理解題。根據(jù)“The dimmed lights before taking off from the runway and landing are a flight precaution used to help passengers’ eyes adjust more quickly during an emergency escape.”可知,調(diào)暗燈光是一種飛行預(yù)防措施,用于幫助乘客在緊急逃生時(shí)眼睛快速適應(yīng)。

　　2.What is one of the roles of shortening “dark adaptation” time?

　　A.Slowing down the landing.

　　B.Adjusting the plane lights.

　　C.Keeping passengers calm.

　　D.Helping the crew judge outside risks.

　　答案　D

　　解析　細(xì)節(jié)理解題。根據(jù)最后一段中的“It also makes it easier for flight attendants to assess any outside risks...”可知,它能幫助機(jī)組人員判斷外面的危險(xiǎn)。

　　3.What does the underlined word “It” in the last paragraph refer to?

　　A.Dimming lights. B.The escape process.

　　C.Reducing tension. D.The passage.

　　答案　A

　　解析　代詞指代題。根據(jù)上文的“Not only does dimming lights add valuable time to the escape process,it also reduces the tension...”可知,此處的It指的就是“被調(diào)暗的燈光”,所以選A項(xiàng)。

　　4.What is the text mainly about?

　　A.A tip of air travel.

　　B.An emergency event on a plane.

　　C.A warning message on a plane.

　　D.An explanation of an airline safety measure.

　　答案　D

　　解析　主旨大意題。通讀全文可知,飛行員在起飛和降落的過(guò)程中使燈光變暗是一種安全措施,文章是對(duì)該措施的解釋,所以選D項(xiàng)。

　　【長(zhǎng)難句分析】Not only does dimming lights add valuable time to the escape process,it also reduces the tension on your eyes if you need to look outside,or see the emergency lighting along the passage.

　　被調(diào)暗的燈不僅為逃離過(guò)程增加了寶貴的時(shí)間,而且在你需要往外看,或者看通道上的緊急照明時(shí),它也能會(huì)減少眼睛的壓力。

　　本句是一個(gè)由Not only...引導(dǎo)的倒裝句,if引導(dǎo)的是條件狀語(yǔ)從句,need和see是并列謂語(yǔ)。