2015年職稱英語考試?yán)砉ゎ愰喿x理解模擬題(7)

    考試動(dòng)態(tài)：2015報(bào)名時(shí)間|報(bào)名官網(wǎng)|報(bào)考條件|免考條件|教材變化解析及備考攻略

    課程推薦：2015職稱英語高效保過套餐

    重點(diǎn)推薦：2015年職稱英語考試?yán)砉ゎ愰喿x理解模擬題匯總

　　2015年職稱英語考試理工類閱讀理解模擬題(7)

　　Where Have Allthe Bees Gone

　　Scientists who study insects have a real mystery on theirhands.All across the country，honeybees are leaving their hives and neverreturning. Researchers call this phenomenon colony-collapse1 disorder.Accordingto surveys of beekeepers across the country，25 to 40 percent of the honeybeesin the United States have vanished from their hives since last fall.So far，noone can explain why.

　　Colony collapse is a serious concern because bees playan important role in the production of about one-third of the foods we eat.Asthey feed，honeybees spread pollen from flower to flower.Without 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，compared to the stomachs of healthy bees,” Evans says.It may be that aparasite is damaging the bees digestive organs. Their immune systems may not be working as they should.Moreover，they have high levels of bacteria inside theirbodies.

　　Another cause of colony-collapse disorder may be certain chemicalsthat farmers apply to kill unwanted insects on crops，says Jerry Hayes，chief beeinspector for the Florida Department of Agriculture3.Some 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 not.In any group ofbees there are many different kinds of genes.The more different genes a grouphas，the higher the group’s genetic diversity.So far scientists haven’tdetermined the role of genetic diversity in colony collapse，but it’s a promisingtheory，says Evans.

　　練習(xí)：

　　1. What is the mystery that researchers find hard to explain?

　　A Honeybeesare flying all across the country.

　　B 25-40 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 colony-collapsedisorder?

　　A Because honeybees produce one-third 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 colony-collapsedisorder 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.

　　答案：

　　1. C 　　2. A 　　3. B 　　4. D 　　5. D

     2015年職稱英語考試教材新增匯總

     2015年職稱英語考試備考經(jīng)驗(yàn)匯總

     2015年職稱英語考試技巧匯總