5.Erica David lives in Pinedale,Wyoming,USA,where winter can bring temperatures of below 35degrees Fahrenheit,howling winds,and a lot of snow.So it was just natural that she chose to study snow for her school science fair in the sixth grade.
Now a junior in high school,Erica is in her sixth year of snow experiments,and is well on her way to becoming a snow expert.She started with a basic question:Could snow fences be built to work better?
Snow fences are used to keep snowdrifts(雪堆)from covering areas like roads of train tracks,or to help build up snow where it can help with water shortages in spring when it melts(融化)."Also,I wanted to protect my animals better from blowing snow,"says Erica,who raises goats,sheep,and pigs.
Before she could test fence designs,Erica had to figure out what would act like real snow in her experiments."I tested flour,sugar,and salt before I settled on dishwasher powder,"she explains.
Science fairs offer students the chance to test theories,present findings to judges,and meet other researchers.Erica's many achievements include competing at the Discovery Channel Young Scientist Challenge for middle school students and the Intel International Science and Engineering Fair,where students from around the world present their science research.
But perhaps the best reward is that her research is already being put to good use.She has come up with an improved snow fence design,and this year she's helping think out how to provide water supply to native plants,which have been killed off by drilling at nearby natural gasfields.
"Science fairs are an amazing experience,"says Erica."Just pick your true feeling and go for it."
72.What does the passage suggest to us?C
A.Science fairs are held for high school students in America.
B.Erica is the youngest show expert well known in America.
C.The environment brought much convenience for Erica to study snow.
D.The hope to contribute to her hometown made Erica experiment on snow.
73.In Erica's hometown,snow fences may play a part inD.
a.reducing the harm blowing snow does to animals
b.supplying water resource to the nearby gas fields
c.making up for the lack of water resource.
d.keeping the traffic smooth
A.a(chǎn),b,c B.a(chǎn),b,d
C.b,c,d D.a(chǎn),c,d
74.Science fairs are attractive to students because theyB.
A.can have their research put into practical use
B.can have their scientific ideas tested out
C.a(chǎn)re allowed to help protect the local wildlife
D.can learn about the most advanced technology
75.Which of the following material can best replace snowing in Erica's experiment?D
A.Flour. B.Sugar.
C.Salt. D.Dishwasher powder.
分析 文章講述了Erica住在美國懷俄明州的Pinedale,在那里冬天有狂風和許多雪.因此很自然的在六年級的學?茖W展上她選擇了研究雪花.現(xiàn)在Eric是高三學生,有著六年的雪花試驗的經(jīng)驗,她正在成為了一名雪的專家的路上.她從一個基本問題上開始著手:防雪柵欄是否可以制作得更好?防雪柵欄用來防止雪堆覆蓋路面或者鐵道,也可以用來累積雪,等融化的時候可以存水.而且,我想保護動物以免受到吹雪的傷害.Eric這樣說.她養(yǎng)了山羊,綿羊和豬.
解答 72.C 73.D 74.B 75.D
72.C 根據(jù)文章第一段Erica David lives in Pinedale,Wyoming,USA,where winter can bring temperatures of below 35degrees Fahrenheit,howling winds,and a lot of snow.So it was just natural that she chose to study snow for her school science fair in the sixth grade.可知,Erica住在美國懷俄明州的Pinedale,在那里冬天有狂風和許多雪.因此很自然的在六年級的學校科學展上她選擇了研究雪花.其他選項不符合文意,故選C
73.D 根據(jù)Snow fences are used to keep snowdrifts(雪堆)from covering areas like roads of train tracks,or to help build up snow where it can help with water shortages in spring when it melts(融化)."Also,I wanted to protect my animals better from blowing snow,"says Erica,who raises goats,sheep,and pigs.可知雪柵欄并沒有為附近的gas fields提供水源,故選D
74.B 根據(jù)Science fairs offer students the chance to test theories,present findings to judges,and meet other researchers.可知,Science fairs 吸引人的地方是可以試驗一下他們的科學點子,故選B
75.D 根據(jù)."I tested flour,sugar,and salt before I settled on dishwasher powder,"she explains.可知,最終使用的dishwasher 作為實驗材料來代替雪,故選D
點評 閱讀理解題測試考生在閱讀基礎上的邏輯推理能力,要求考生根據(jù)文章所述事件的邏輯關系,對未說明的趨勢或結局作出合理的推斷;或根據(jù)作者所闡述的觀點理論,對文章未涉及的現(xiàn)象、事例給以解釋.考生首先要仔細閱讀短文,完整了解信息,準確把握作者觀點.