首页
登录
职称英语
Steel is valued for its reliability, but not when it gets cold. Most forms of
Steel is valued for its reliability, but not when it gets cold. Most forms of
游客
2024-03-11
26
管理
问题
Steel is valued for its reliability, but not when it gets cold. Most forms of steel【C1】______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【C2】______at much lower temperatures, while retaining its strength and toughness—without the need for expensive【C3】______.
Steel’s fragility at low temperatures first became a major concern during the Second World War. After German U-boats torpedoed (用鱼雷攻击) numerous British ships, a 2,700-strong fleet of cheap- and-cheerful "Liberty ships" was introduced to replace the lost vessels, providing a lifeline for the【C4】______British. But the steel shells of hundreds of the ships【C5】______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【C6】______to find a solution by mixing it with expensive metals such as nickel.
Yuuji Kimura and colleagues in Japan tried a more physical【C7】______. 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【C8】______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【C9】______needed in a construction job and their weight—by replacing solid supports with【C10】______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 [br] 【C9】
选项
答案
H
解析
名词辨析题。空格前面是介词of,后面是分词结构needed in a construction job作后置定语,因此,空格处应填入名词形式作介词of的宾语。由number和their weight可知,此处需要填入的应该是可数名词复数形式。短文最后一句提到,这将减少从汽车到建筑和桥梁等一切制造所需的钢材。因此,此处是说木村希望减少建筑工作所需材料的数量和重量。空格处所填名词表达的应该是“原材料”或“零件,部件”之类的意思,由此确定,本题答案为H)components“(机器、系统等的)零件,组成部分”。其他备选名词均与此处要表达的意思不符,故排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3524911.html
相关试题推荐
[originaltext][12]Intoday’spersonalitystakes,nothingismorehighlyvalued
[originaltext][12]Intoday’spersonalitystakes,nothingismorehighlyvalued
[originaltext][12]Intoday’spersonalitystakes,nothingismorehighlyvalued
[originaltext][12]Intoday’spersonalitystakes,nothingismorehighlyvalued
Asitis,sleepissoundervaluedthatgettingbyonfewerhourshasbecome
Asitis,sleepissoundervaluedthatgettingbyonfewerhourshasbecome
Asitis,sleepissoundervaluedthatgettingbyonfewerhourshasbecome
Asitis,sleepissoundervaluedthatgettingbyonfewerhourshasbecome
Asitis,sleepissoundervaluedthatgettingbyonfewerhourshasbecome
Asitis,sleepissoundervaluedthatgettingbyonfewerhourshasbecome
随机试题
Iwas13whenBenjicameintoourlives.Withhisdeepbrowneyes,floppyea
"Shetakes______herfatherclosely,saidthesurprisedneighborwhohasnots
检疫期确定是根据该传染病的( )。A.隔离期 B.传染期 C.最长潜伏期
A.镇静催眠药B.胆碱受体拮抗剂C.胆碱受体激动剂D.肾上腺素受体拮抗剂E.肾上
共用题干 男婴,7个月,近两个月来肤色苍白,食欲减退入院。生后一直人工喂养,未
关于急性呼吸衰竭的描述,下列哪项是错误的A.各种累及呼吸中枢或呼吸器官的疾病导致
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
简述现代企业人力资源管理各个历史发展阶段的特点。
基金评级不只是对基金本身的评价,还可以兼顾到对基金公司投资能力的评价。()
A. B. C. D. E.图中来源于姜科,药用部位为干燥成熟果实的是(
最新回复
(
0
)