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2017職稱英語考試最新練習(xí)題（附答案）
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.
注釋：
1. sometimes not for two years：相當(dāng)于 sometimes it does not fall apart for two years
2. run：(編織物 )抽絲
練習(xí)：
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
答案與題解：
1. A flying bird飛入蜘蛛網(wǎng)時(shí)有股沖力，網(wǎng)線堅(jiān)韌才能捕捉到它，所以選 tough。本句中的 without breaking也指示 tough。
2. B英語中蜘蛛網(wǎng)絲是 spider silk。見第三、第四段分別出現(xiàn)的 silky thread和 spider silk。
3. D 本句說蜘蛛織網(wǎng)的機(jī)制和過程，所以選， weave而且，這種蜘蛛就叫 Golden Orb Weaver。
4. C從上下文判斷， along之后接的是 the dragline，其代詞應(yīng)為 it。
5. D 本句說 Golden Orb Weaver與某些種類的蜘蛛不同，它不用每天織新網(wǎng)，只要網(wǎng)不破，就能一直使用下去，有時(shí)一用 2年，所以選， reuses。
6. C本句將 Golden Orb Wesver蜘蛛網(wǎng)的牢度和張度與防彈衣材料 Kevlar對比，說明該蜘蛛網(wǎng)堅(jiān)韌的程度。填入的詞應(yīng)該是 Kevlar的同位語， Kevlar是一種材料，所以選 material。
7. B除了上下文的意思要求填 length之外，本句中的用詞 stretch和 longer都指示要用 length。
8. A come后面可接形容詞。 come close意為“接近”。 come well，come open，come awake都能搭配，但意思與上下文配不上。
9. C It is no wonder (that)是“不足為奇，十分自然”的意思。只有選 wonder意思才連貫。
10. B從意義上判斷， a steady supply是正確的選擇。 shipment (運(yùn)送)、run (運(yùn)轉(zhuǎn))或 exchange(交換)的意思與上下文配不上。
11. D 上下文的意思要求用“起作用”這個(gè)詞，英語 work在本句的詞義是“起作用”。
12. C下一句是以 Next開始的。有 next，前面很可能有 first之類表次序的詞。
13. A 常識告訴我們，把 dragline silk proteins分泌在 milk里，才容易分離出來，所以，選 meat，lungs或 muscle都是不合常理的。
14. B在 without之后要用 any，一般不用 some。英語不說 without no …， many不能修飾 help。
15. A 本題只能選 as fast as。若選 B、C 或 D，意思與上下文配不上。
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