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职称英语测验完形填空积年试题及剖析
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Wonder Webs
Spider webs are more than homes, and they are ingenious traps. And the world’s best web spinner may be the Golden Orb Weaver spider. The female Orb Weaver spins a web of fibers thin enough to be invisible to insect prey, yet 1 enough to snare a flying bird without breaking.
The secret of the web’s strength? A type of super-resilient 2 called dragline. When the female spider is ready to 3 the web’s spokes and frame, she uses her legs to draw the airy thread out through a hollow nozzle in her belly. Dragline is not sticky, so the spider can race back and forth along 4 to spin the web’s trademark spiral.
Unlike some spiders that weave a new web every day, a Golden Orb Weaver 5 her handiwork until it falls apart, sometimes not for two years1. The silky thread is five times stronger than steel by weight and absorbs the force of an impact three times better than Kevlar, a high-strength human-made 6 used in bullet-proof vests. And thanks to its high tensile strength, or the ability to resist breaking under the pulling force called tension, a single strand can stretch up to 40 percent longer than its original 7 and snap back as well as new. No human-made fiber even comes 8 .
It is no 9 manufacturers are clamoring for spider silk. In the consumer pipeline: high-performance fabrics for athletes and stockings that never run2. Think parachute cords and suspension bridge cables. A steady 10 of spider silk would be worth billions of dollars — but how to produce it? Harvesting silk on spider farms does not 11 because the territorial arthropods have a tendency to devour their neighhors.
Now, scientists at the biotechnology company Nexia are spinning artificial silk modeled after Golden Orb dragline. The 12 step: extract silk-making genes from the spiders. Next, implant the genes into goat egg cells. The nanny goats that grow from the eggs secrete dragline silk proteins in their 13 . “The young goats pass on the silk-making gene without 14 help from us,” says Nexia president Jeffry Turner. Nexia is still perfecting the
spinning process, but they hope artificial spider silk will soon be snagging customers 15 the real thing snags bugs.
正文：
1. sometimes not for two years：相称于 sometimes it does not fall apart for two years
2. run：(编织物 )抽丝
操练：
1. A tough B soft C large D smooth
2. A cloth B silk C nylon D wool
3. A repair B pull C move D weave
4. A him B her C it D those
5. A refixes B reproduces C remakes D reuses
6. A metal B mass C material D model
7. A bredth B length C height D strength
8. A close B well C open D awake
9. A hurry B worry C wonder D use
10. A shipment B supply C run D exchange
11. A run B go C deal D work
12. A previous B foremost C first D front
13. A milk B meat C lungs D muscle
14. A no B any C some D many
15. A as fast as B as gently as C as fully as D as little as
谜底与题解：
1. A flying bird飞入蜘蛛网时有股冲力，网线坚固能力捉拿到它，以是选 tough。本句中的 without breaking也唆使 tough。
2. B英语中蜘蛛网丝是 spider silk。见第三、第四段别离呈现的 silky thread和 spider silk。
3. D 本句说蜘蛛织网的机制和进程，以是选， weave并且，这类蜘蛛就叫 Golden Orb Weaver。
4. C从高低文判定， along以后接的是 the dragline，其代词应为 it。
5. D 本句说 Golden Orb Weaver与某些品种的蜘蛛差别，它不必天天织新网，只需网不破，就可以一向利用下去，偶然一用 2年，以是选， reuses。
6. C本句将 Golden Orb Wesver蜘蛛网的牢度和张度与防弹衣资料 Kevlar对照，申明该蜘蛛网坚固的水平。填入的词应当是 Kevlar的同位语， Kevlar是一种资料，以是选 material。
7. B除高低文的意义请求填 length以外，本句中的用词 stretch和 longer都唆使要用 length。
8. A come后面可接描述词。 come close意为“靠近”。 come well，come open，come awake都能搭配，但意义与高低文配不上。
9. C It is no wonder (that)是“缺乏为奇，非常天然”的意义。只要选 wonder意义才联贯。
10. B从意义上判定， a steady supply是准确的.挑选。 shipment (输送)、run (运行)或 exchange(互换)的意义与高低文配不上。
11. D 高低文的意义请求用“起感化”这个词，英语 work在本句的词义是“起感化”。
12. C下一句因此 Next起头的。有 next，后面很能够有 first之类表顺序的词。
13. A 知识告知咱们，把 dragline silk proteins排泄在 milk里，才轻易分手出来，以是，选 meat，lungs或 muscle都是分歧常理的。
14. B在 without以后要用 any，普通不必 some。英语不说 without no …， many不能润色 help。
15. A 本题只能选 as fast as。若选 B、C 或 D，意义与高低文配不上。
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