Question

7．One of the blue whales，the largest animal alive today，has been caught making an appropriately big journey through the South Pacific．The whale was first recorded near the Galapa gos Island，west of Costa Rica．Years later，that same whale was photographed off the coast of Chile in South America，a new study reports．The two places are separated by some 5，200 Kilometers （3，200miles），which means it swam farther than the distance between New York and Los Angeles．
Scientists reported the whale's mammothjourney on June 11 in"Marine Mammal Science"．
Blue whales are surprisingly difficult to study because they are found in all the world's oceans but live in deep waters．Moreover，the species nearly died out as a result of hunting a century ago．Populations are recovering thanks to the laws，but because there are so few of the animals，this speci es is still considered endangered．
To aid the species'recovery，scientists need to know more about where they travel，explains study leader Juan Pablo Torres-Florez．He is a whale researcher at Austral University of Chile in Valdivia．Understanding the whales'mi grations could help guide protection measures，he says．
In 1998，a group of scientists surveyed blue whales in the waters off islands known as the Gala pagos （Gah-LOP-ah-GOES） where they photographed the whales they saw．And，without hurting the animals，they also collected samples of some of the whales'meat which let them later look at the animals'DNA．A different group of scientists collected similar data from whales off the coast of Chile from 2002 to 2013．
To make the comparison job easier，scientists focus on the area around a whale's fin（鰭），which is on its back．"Comparing those patterns we are able to identify if a whale is the same one we saw in different places or if the same whale is sighted during different years in the same place，"he says．
One whale showed up in the Gala pagos on November 6，1998，among a group of nine animals．It appeared again in Chile on February 23，2006．The photographs and the DNA matched．The whale was nicknamed"Isabela，"a combination of Torres-Florez's daughter and the island near which it was sighted．The whale's journey was at least 5，200 kilometers（3，200miles）．That makes it the longest north-south journey ever recorded for a member of her species．
28．The underlined word"mammoth"is the nearest in meaning toB．
A．driven     B．huge     C．mysterious    D．natural
29．What do you know about the species of blue whale？C
A．They live in deep waters，so they can survive．
B．They have fins on the back so that they can be recognized．
C．They weren't protected effectively 100 years ago．
D．They were driven to the shallow sea and nearly died out．
30．The researchers have managed to get the species'DNAD．
A．form the whale named Isabela
B．by catching whale from the sea
C．to study which species it belongs to
D．using methods friendly to the whales
31．The study leader is Juan Pablo Torres-Florez，A．
A．who recorded the longest journey of blue whales
B．who got the whales'DNA in 1998
C．who first recognized blue whales'back fins
D．who uses the fingerprint to recognize blue whales．

Answer 1

分析 本文屬于說(shuō)明文閱讀，作者通過(guò)這篇文章主要向我們描述了關(guān)于藍(lán)鯨的一些知識(shí)，100年前藍(lán)鯨沒(méi)有得到有效的保護(hù)，而現(xiàn)在科學(xué)家們已經(jīng)研究了通過(guò)和平的手段了解它們．

解答 28．B．詞義猜測(cè)題．根據(jù)第二段Scientists reported the whale's mammothjourney on June 11 in"Marine Mammal Science可知6月11日，科學(xué)家在"海洋哺乳動(dòng)物科學(xué)"上報(bào)告了鯨魚(yú)的龐大旅程；意為巨大的；故選B．
29．C．推理判斷題．根據(jù)第三段Moreover，the species nearly died out as a result of hunting a century ago可知100年前藍(lán)鯨沒(méi)有得到有效的保護(hù)；故選C．
30．D．細(xì)節(jié)理解題．根據(jù)第四段In 1998，a group of scientists surveyed blue whales in the waters off islands known as the Gala pagos （Gah-LOP-ah-GOES） where they photographed the whales they saw可知研究人員已經(jīng)設(shè)法獲得物種的dna用了不傷害動(dòng)物的方法；故選D．
31．A．細(xì)節(jié)理解題．根據(jù)第二段That makes it the longest north-south journey ever recorded for a member of her species可知他記錄藍(lán)鯨的最長(zhǎng)的旅程；故選A．

點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．