練習(xí)：
1． Which of the following about the significance of the research on cryptic species
is NOT true?
A The results of the research can help the development of many other researchareas．
B The restllts of the research can help the development of biodiversityestimates．
C The results of the research can help our understanding of infectious diseaseevolution．
D The results of the research can help our understanding of “survival of thefittest．”
2． What was scientists’ understanding of cryptic species?
A They occurred in equal numbers in all biogeographical regions．
B They were mostly found in insects find reptiles．
C They were likely to be in tropical rather than temperate regions．
D Both B and C．
3． Do scientists know how many cryptic species exist?
A Not yet．
B Yes，they do．
C They will know the answer in another one or two years;
D They will never know the answer．
4． Which of the following about the African bush elephant and the African elephant is true?
A The WCU are interbreeding those elephants．
B They are interbreeding species．
C They are two genetically distant species．
D They depend on each other for survival．
5． People were confused in their attempts to control malaria in Europe in the early1900s，because scientists
A identified only one mosquito species instead of six species．
B thought only three mosquito species transmitted disease．
C thought there was only one mosquito species．
D did not know what species was being studied．
答案與題解：
1． D 短文的第一段第二句的大意是，研究結(jié)果為廣泛的研究領(lǐng)域提供啟示，包括生物多樣性研究，還能幫助我們理解傳染疾病及其演變。所以，選項(xiàng)A、B、C都是正確的，它們不是答案。選項(xiàng)D的“適者生存”的內(nèi)容文章中沒有提及，因此是本題的答案。
2． D 短文的第二段第二句描述的是科學(xué)家目前的研究結(jié)果，第三段描述的是科學(xué)家在這之前對(duì)于cryptic species的理解。本題用的是過去式，問的是過去的狀況，因此，答案在第三段中，B和C是答案，所以D是正確選擇。
3． A 第三段和第五段提供了答案。第三段的倒數(shù)第二句中的Until．．．no one will know just how many cryptic species exist．其意思就是人們目前還不了解。第五段的最后一句也說明了研究者目前對(duì)此尚未了解。
4． C 答案在第六段中。該段舉了非洲大象為例，說明什么是cryptic species。第六段的句子“A 2001 study found the elephants were actually two genetically distinct，non- interbreeding spemes”是選擇C的依據(jù)。選項(xiàng)A不對(duì)，the WCU并沒有雜交繁殖這兩種象。選項(xiàng)B不對(duì)，短文說這兩種象是非雜交物種。選項(xiàng)D的內(nèi)容短文中找不到。
5． A 短文最后一段告訴我們，由于對(duì)蚊子種類不了解，20世紀(jì)初期瘧疾曾肆虐歐洲，最終，科學(xué)家才了解到蚊子這一物種不是由一個(gè)種類而是由六個(gè)種類組成。所以，應(yīng)該選擇A。
1． Which of the following about the significance of the research on cryptic species
is NOT true?
A The results of the research can help the development of many other researchareas．
B The restllts of the research can help the development of biodiversityestimates．
C The results of the research can help our understanding of infectious diseaseevolution．
D The results of the research can help our understanding of “survival of thefittest．”
2． What was scientists’ understanding of cryptic species?
A They occurred in equal numbers in all biogeographical regions．
B They were mostly found in insects find reptiles．
C They were likely to be in tropical rather than temperate regions．
D Both B and C．
3． Do scientists know how many cryptic species exist?
A Not yet．
B Yes，they do．
C They will know the answer in another one or two years;
D They will never know the answer．
4． Which of the following about the African bush elephant and the African elephant is true?
A The WCU are interbreeding those elephants．
B They are interbreeding species．
C They are two genetically distant species．
D They depend on each other for survival．
5． People were confused in their attempts to control malaria in Europe in the early1900s，because scientists
A identified only one mosquito species instead of six species．
B thought only three mosquito species transmitted disease．
C thought there was only one mosquito species．
D did not know what species was being studied．
答案與題解：
1． D 短文的第一段第二句的大意是，研究結(jié)果為廣泛的研究領(lǐng)域提供啟示，包括生物多樣性研究，還能幫助我們理解傳染疾病及其演變。所以，選項(xiàng)A、B、C都是正確的，它們不是答案。選項(xiàng)D的“適者生存”的內(nèi)容文章中沒有提及，因此是本題的答案。
2． D 短文的第二段第二句描述的是科學(xué)家目前的研究結(jié)果，第三段描述的是科學(xué)家在這之前對(duì)于cryptic species的理解。本題用的是過去式，問的是過去的狀況，因此，答案在第三段中，B和C是答案，所以D是正確選擇。
3． A 第三段和第五段提供了答案。第三段的倒數(shù)第二句中的Until．．．no one will know just how many cryptic species exist．其意思就是人們目前還不了解。第五段的最后一句也說明了研究者目前對(duì)此尚未了解。
4． C 答案在第六段中。該段舉了非洲大象為例，說明什么是cryptic species。第六段的句子“A 2001 study found the elephants were actually two genetically distinct，non- interbreeding spemes”是選擇C的依據(jù)。選項(xiàng)A不對(duì)，the WCU并沒有雜交繁殖這兩種象。選項(xiàng)B不對(duì)，短文說這兩種象是非雜交物種。選項(xiàng)D的內(nèi)容短文中找不到。
5． A 短文最后一段告訴我們，由于對(duì)蚊子種類不了解，20世紀(jì)初期瘧疾曾肆虐歐洲，最終，科學(xué)家才了解到蚊子這一物種不是由一個(gè)種類而是由六個(gè)種類組成。所以，應(yīng)該選擇A。