【正文】 hile the chimps tried to understand the instructions ... 3. What was the result of the finding， according to Paragraph 5? A Three chimps used more energy walking on two legs. B One chimp used less energy walking on two legs. C One chimp used about the same energy walking on two legs as on four. D All of the above. 4. What was true of the hypothesis of the research? A Our apelike ancestors were anatomically different but had the same gaits. B Bipeds with natural selection had an advantage over quadruped. C Our apelike ancestors could adapt to different climate changes due to geic variation. D Bipeds had an advantage over quadrupeds due to changes in the environment. 5. What does fossil and molecular evidence tell us about our earliest ancestors? A They experienced more climate changes than we do today. B Due to changes in climate， they were forced to travel between food patches. C They could cover more ground than their quadrupedal peers because they used less energy. D They could travel longer distances on the ground than those who could use less energy. 標準答案： C,B,D,B,C Where Have Allthe Bees Gone? Scientists who study insects have a real mystery on across the country ， honeybees are leaving their hives and neverreturning. Researchers call this phenomenon colonycollapse1 surveys of beekeepers across the country， 25 to 40 percent of the honeybeesin the United States have vanished from their hives since last far，noone can explain why. Colony collapse is a serious concern because bees playan important role in the production of about onethird of the foods we feed， honeybees spread pollen from flower to this process， aplant can’t produce seedsor fruits. Now， a group of scientists andbeekeepers have teamed up to try to figure out what’s causing the alarmingcollapse of so many colonies. By sharing their expertise in honeybee behavior， health， and nutrition， team members hope to find out what’s contributingto thedecline and to prevent bee disappearance in the future. Itcould be that disease is causing the disappearance of the bees. To explore that possibility， Jay Evans， a researcher at the United States Department ofAgriculture (USDA) Bee Research Laboratory2， examines bees taken from coloniesthat are collapsing.“We know what a healthy bee should look like on theinside， and we can look for physical signs of disease,” he says. And bees fromcollapsing colonies don’t look very healthy. “Their stomachs are worndown， pared to the stomachs of healthy bees,” Evans may be that aparasite is damaging the bees digestive ans. Their immune systems may not be working as they ， they have high levels of bacteria inside theirbodies. Another cause of colonycollapse disorder may be certain chemicalsthat farmers apply to kill unwanted insects on crops， says Jerry Hayes， chief beeinspector for the Florida Department of studies，hesays， suggest that a certain type of insecticide affects the honeybee’s nervoussystem (which includes the brain) and memory.”It seems tike honeybees are goingout and getting confused about where to go and what to do,” he says. If itturns out that a disease is contributing to colony collapse， bees genes couldexplain why some colonies have collapsed and others have any group ofbees there are many different kinds of more different genes a grouphas， the higher the group’s geic far scientists haven’tdetermined the role of geic diversity in colony collapse ， but it’s a promisingtheory ， says Evans. 詞匯： honeybee/5hQnIbi:/ parasite/5pArEsait/ 。寄生生物 hive/haiv/ 。蜂箱 digestive/di5dVestiv,dai/ pollen/5pClEn/ immune/i5mju:n/ beekeeper/5bi:ki:pE (r)/ insecticide/in5sektisaid/ expertise/7ekspE5ti:z/n. diversity/dai5vE:siti/ 專門知識，專長注釋： 1. colonycollapse：群體癱瘓。 colony 有 “殖民地 ”的意思，在此意為： a groupof the same kind of animals， plants， or onecelled anisms living or 生長在一起的同種動物、植物或單細胞有機體。 2. the United States Department ofAgriculture(USDA) Bee Research Laboratory：美國農(nóng)業(yè)部蜜蜂研究實驗室。 3. the FloridaDepartment of Agriculture：佛羅里達農(nóng)業(yè)局。佛羅里達是美國東南部的一個州，瀕臨大西洋和墨西哥灣。 練習： 1. What is the mystery that researchers find hard to explain? A Honeybeesare flying all across the country. B 2540 percent of the honeybees inthe US have died. C Honeybees are leaving their hives and do not return. D Honeybee hives are in disorder. 2. Why are researchersseriously concerned with the phenomenon of colonycollapsedisorder? A Because honeybees produce onethird of the foods we eat. B Becausehoneybees feed on flowers. C Because honeybees eat seeds of flowers. D Both B and C. 3. What are the possible causes of colonycollapsedisorder given by the scientists? A Worsening environment. B Diseaseand chemicals. C Dwindlingnumber of flowers around. D Changes ingenes? structures. 4. According to the fifth paragraph， which of thefollowing about bees? genes istrue? A Bees? genes allow them toexpand their colonies. B Bees?genes help keep them in their hives. C Bees?genes make them fly from flower to flower. D Bees?genes couldexplain the collapse of some colonies. 5. What explanation is given byJerry Hayes to the phenomenon? A Farmers apply certain chemicals to killunwanted bees. B The insecticide destroys the honeybee?s nervous system. C The insecticide affects the honeybee?s memory. D All of theabove. 標準答案： C,A,B,D,D A Sunshade for the Pla Even with the best will1 in the world， reducing our carbon emissions is not going to prevent global has bee clear that even if we take the most strong measures to control emissions， the uncertainties in our climate models still lea39。ye open the possibility of extreme warming and rises in sea the same time， resistance by