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　　A bird’s feathers would seem to be a (i)_____ design for protecting a bird from attack by microscopic organisms. They create a warm, moist space next to the skin that could be an ideal incubator for spores. Wild birds rarely (ii)_____ skin diseases, however. The chemicals in the sebum include an array of antibacterial and antifungal agents that allow the bird’s skin to (iii)_____.

　　Blank (I)Blank (II)Blank (III)

　　A：perfect D：contract G：stay healthy

　　B：typical E：overcome H：become irritated

　　C：poor F：notice I：recover quickly

　　答案：CDG

　　The economic recovery was somewhat lopsided: (i)_____ in some of the industries economies while(ii)_____ in others of them.

　　Blank (I)Blank (II)

　　A：unexpected D：robust

　　B：feeble E：turbulent

　　C：swift F：predictable

　　答案：BD

　　There are two opposing theories about mountain formation and climate over the past 40 million years: either the surge of mountain building (i)_____ the global cooling or vice versa. The first of these two theories asserts that widespread mountain building cooled (ii)_____ mountains and climate. For example, mountain glaciers tent to be (iii)_____: once established, they increase the reflectivity of the surface, thus lowering temperatures and allowing more ice to form.

　　Blank (I)Blank (II)Blank (III)

　　A：superseded D：disparity between G：unpredictable

　　B：halted E：feedback between H：static

　　C：caused F：complexity of I：self-perpetuating

　　答案：CEI

　　In the wild, no other mammal _____ individuals from another species; badgers do not tend hares, deer do not nurture baby squirrels, lions do not care for giraffes.

　　A：protects

　　B：fosters

　　C：aids

　　D：cajoles

　　E：adopts

　　F：coaxes

　　答案：BE

　　Wilson is wont to emphasize the _____ of ants, how ants with full stomachs will regurgitate liquid food for those without , or how the old will fight so the young can survive.

　　A：beneficence

　　B：altruism

　　C：unpredictability

　　D：intelligence

　　E：fecundity

　　F：fertility

　　答案：AB

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