Animals Can Sense Natural Disasters
Among the dead in South Asia’ s tsunami（海嘯）were many tourists at Sri Lanka’ s national wildlife park at Yala. But very few of the park’s animals — elephants, buffaloes, monkeys and wild cats — appear to have died. There are theories that animals can sense natural disasters and run away to safety.
First, it’s possible that the animals may have heard the quake before the tsunami hit. The underwater burst produced sound waves known as infrasound（次聲）. Humans can’t hear infrasound, but many animals including dogs, elephants, tigers and pigeons can.
A second early warning sign the animals might have sensed is ground vibration（震動(dòng)）. The great quake would have produced vibrational waves known as Rayleigh waves. These vibrations move through the ground like waves moving on the surface of the ocean but faster. They travel at ten times the speed of sound. The Rayleigh waves would have reached Sri Lanka hours before the water hit. Mammals, birds, insects and spiders can sense Rayleigh waves. So the animals at Yala might have felt the Rayleigh waves and then run to higher ground.
But what about humans? While we can’t hear infrasound, we can feel it, although we don’t necessarily know we’re feeling it. We also experience Rayleigh waves by special sensors in our joints（關(guān)節(jié)）, which exist just for that purpose. Sadly, it seems we don’t pay attention to the information when we get it. Maybe we screen it out because there’s so much going on before our eyes and in our ears.
小題1:Why did few animals at Yala die when the tsunamis that caused a huge number of human deaths hit?
A．Because human beings cannot hear the infrasonic sound.
B．Because the animals were staying at a higher place in the park.
C．Because the animals were able to run much faster than human beings.
D．Because the animals might have picked up the danger signals and ran away.
小題2:Which of the statements about “Rayleigh waves” is true?
A．Rayleigh waves can be felt both by animals and human beings.
B．Rayleigh waves, just like infrasonic sound, can only be felt by animals.
C．Rayleigh waves are vibrational waves that usually cause quakes or tsunamis.
D．Rayleigh waves move on the ocean surface at a speed ten times that of sound waves.
小題3:According to the passage, which of the statement is true?
A．We can’t feel the infrasound so we can’t be informed of the danger.
B．We ignore the information of tsunami’s coming even though we can also get it.
C．We were so busy on our minds that we feel neither infrasound nor Rayleigh waves.
D．We can feel Rayleigh waves and infrasound so we can escape the danger like animals.

小題1:D
小題2:A
小題3:B

試題分析：本文分析了動(dòng)物為什么可以逃開自然災(zāi)害？尤其分析了在這次的海嘯中很多的短文逃生的原因。
小題1:D 細(xì)節(jié)題。根據(jù)第一段最后一句There are theories that animals can sense natural disasters and run away to safety.說明動(dòng)物似乎已經(jīng)能夠感覺到危險(xiǎn)，會(huì)早點(diǎn)逃開。D正確。
小題2:A 細(xì)節(jié)題。根據(jù)文章3,4段We also experience Rayleigh waves by special sensors in our joints（關(guān)節(jié)）, which exist just for that purpose. 和Mammals, birds, insects and spiders can sense Rayleigh waves.說明動(dòng)物和人都可以感覺到Rayleigh waves.故A正確。
小題3:B 細(xì)節(jié)題。根據(jù)文章倒數(shù)第二行it seems we don’t pay attention to the information when we get it.說明B正確。
點(diǎn)評(píng)：本文分析了動(dòng)物能夠避開自然災(zāi)害的原因，屬于科普類短文，此類文章的最大的障礙是詞匯以及考生對(duì)閱讀內(nèi)容的不熟悉，需要考生在閱讀的時(shí)候有足夠的耐心。要養(yǎng)成在上下文串聯(lián)中猜測(cè)詞義的能力，根據(jù)上下文中出現(xiàn)的同義詞，近義詞，反義詞，以及詞義的解釋來理解生詞。同時(shí)要抓住文章的中心，不要受其他信息的影響。要根據(jù)題目及選項(xiàng)以及文章的上下文串聯(lián)合理的判斷推理
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1016 DW Amsterdam
The Netherlands
 
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which works to save endangered
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Wellbrook Court
Girton Road
Cambridge CB3 ONA
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Information Officer
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Avenue du Mont-Blanc
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A．Endangered animals
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