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六級閱讀選詞填空steel
Steel is valued for its reliability, but not when it gets cold. Most forms of steel ___26__ become brittle(脆的)at temperatures below about -25℃ unless they are mixed with other metals. Now, though, a novel type of steel has been developed that resists ___27__ at much lower temperatures, while retaining its strength and toughness – without the need for expensive ___28__.
Steel’s fragility at low temperatures first became a major concern during the Second World War. After German U-boats torpedoed(用魚雷攻擊)numerous British ships, a 2700-strong fleet of cheap-and-cheerful 「Liberty ships」 was introduced to replace the lost vessels, providing a lifeline for the ___29__ British. But the steel shells of hundreds of the ships ___30__ in the icy north Atlantic, and 12 broke in half and sank.
Brittleness remains a problem when building steel structures in cold conditions, such as oil rigs in the Arctic. So scientists have ___31__ to find a solution by mixing it with expensive metals such as nickel.
Yuuji Kimura and colleagues in Japan tried a more physical ___32__. Rather than adding other metals, they developed a complex mechanical process involving repeated heating and very severe mechanical deformation, known as tempforming.
The resulting steel appears to achieve a combination of strength and toughness that is ___33__ to that of modern steels that are very rich in alloy content and, therefore, very expensive.
Kimura’s team intends to use its tempformed steel to make ultra-high strength parts, such as bolts. They hope to reduce both the number of ___34__ needed in a construction job and their weight – by replacing solid supports with ___35__ tubes, for example. This could reduce the amount of steel needed to make everything from automobiles to buildings and bridges.
A) abruptly I) cracked
B) additives J) fractures
C) approach K) hollow
D) ardently L) relevant
E) besieged M) reshuffled
F) channel N) strived
G) comparable O) violent
H) components
【答案】AJBEI NCGHK
【詳解】
26. 這個句子結構是完整的，缺修飾成分，副詞修飾動詞，所以填副詞。故選項定位懂啊A和D，根據句意，大多數的鋼鐵在溫度低於-25℃時會突然變得易脆，除非它們與其它金屬混合。故答案為A abruptly突然地。
27. a novel type of steel has been developedthat resists ___27__我們開發了一種新的鋼鐵，怎樣的鋼鐵呢?後面是定語從句，resist ____，所以這個空缺賓語，填名詞。根據句意，應為J fractures折斷。
28. expensive _____，填名詞，根據句意，應填B additives添加劑。
29. 前面是冠詞，後面是名詞，此處填形容詞，根據句意，答案應為E besieged，被包圍的。
30. 這句話缺謂語動詞，根據句意，數百艘船的鋼鐵外殼在冰冷的北大西洋中裂開，12艘船裂成兩半，沉沒。填cracked，撞擊，破裂。
31. have done，完成時態，需要填過去分詞。strive to do 固定搭配，努力做某事，這裡指「科學家們一直在努力尋找一種解決方案，將鋼鐵與鎳等昂貴金屬混合使用。」，故選項N正確。
32. 這個空缺單數名詞，使用一種方法。故選項C approach正確。
33. 缺形容詞，be comparable to 和……比得上的
34. 缺名詞，components，組成部分。
35. with _____ tubes，缺形容詞。用空的管子代替堅硬的支撐，hollow 空的。
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