Choosecorrectanswerstothequestion:
1.Themainpurposeofthispassageisto______.
A.describethatanimalscanmakedifferentsounds
B.provethatanimals’voicescanplaypracticalroles
C.inspirethereaderstomakemoreinventions
D.startlethereaderswithsomeshockingfacts
2.ThediscoveryofecholocationmayhelpwithallofthefollowingEXCEPT
A.measuringthedepthofthesea
B.distinguishingdifferentkindsoffish
C.improvingthefunctionsofradar
D.varyingthesizeandnatureofanobject
3.Bysaying"Ashoaloffishwilldothis"(Lines6-7,Para.2),theauthormeans________.
A.onlyonespecialkindoffishcanreflectsounds
B.onlyonespecialkindoffishcanbeusedtohelplocateaship
C.alargegroupoffishcanreflectsounds
D.alargegroupoffishcanbeusedtohelplocateaship
4.Asitisdiscussedinthepassage,thesqueaksofbatscanbefunctionallycomparedwith________.
5.Whichofthefollowingstatementscanbeinferredfromthepassage?
A.Animalsaremoreintelligentthanhumans.
B.Humansaremoreintelligentthananimals.
C.Animalsareoftencomparedwithhumaninventions.
D.Humansareofteninspiredbyanimals.
1.[B]主旨大意题。文章第1段就点明主题，明确指出以蝙蝠为例，动物发出的声音有实际作用，只有B可以概括文章的这个写作目的。
2.[C]事实细节题。本题考査列举处，可用排除法解答。A、B、C在文中都有相关提及。D利用第2段中的varying制造干扰。在原文中，指的是回声因障碍物的不同而不同，而D偷换概念、曲解文意，D中的varying为及物动词，意为“改变”,显然不可能是回声定位的发现带来的功效。
3.[C]词义推断题。本题考查对shoal的词义推测及代词this的理解。依据第2段最后几句话,可推测出ashoaloffish指的是“海里的一群鱼”;this则是指上一句提到的“任何固体都可以反射声音”，因此这句话表明一大群鱼就能像一个固体一样反射声音。
4.[D]推理判断题。根据最后一段可知，蝙蝠发出吱吱声可以探测障碍物的距离，而第2段也指出轻敲船体可测知海底的距离，因此在功能上,D与蝙蝠的吱吱声相同。A中的humanlanguages在文中未提到;B和C在文中各自的例子中充当的都是障碍物的角色，因此都不正确。
5.[D]推理判断题。文章先说动物的回声定位功能,再说到回声定位探测仪的发明,由此可见，是动物的某些能力启发了人类的创造，因此只有D可从文中推测。文章并没有从智力方面比较人类和动物，因此可以排除A和B;尽管文章说到了蝙蝠和雷达的原理相似，但是C中的often一词无据可循，且C的说法浮于表面，没有说到重点，故排除。
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