首页
登录
职称英语
A scientific discovery is often made 【C1】______ before someone is able to p
A scientific discovery is often made 【C1】______ before someone is able to p
游客
2024-10-24
37
管理
问题
A scientific discovery is often made 【C1】______ before someone is able to put it to use. 【C2】______ , scientists discovered how to split atoms decades 【C3】______ the invention of the atomic bomb and the use of 【C4】______ power to produce electricity. But sometimes discovery and 【C5】______ happen at the same time, as occurred more than thirty years ago 【C6】______ the discovery of coherent light and the invention of the laser.
The word laser 【C7】______ "light amplification by stimulated emission of radiation." To many people, lasers are very mysterious, but a laser is simply a 【C8】______ that produces a strong light. The light from the laser is called 【C9】______ light because it is light that only moves in one direction. 【C10】______ , incoherent light, like the light from the sun or light from a bulb, moves away from its source 【C11】______ all directions, so its strength is very spread out. The light from a laser, moving in only one direction and 【C12】______ in a narrow beam, is much stronger. Laser light is created by a 【C13】______ called stimulated emission. In this process, the atoms of a certain substance, such as a crystal or a gas, are excited 【C14】______ that they produce coherent light. A person working with a laser can aim this coherent light, 【C15】______ a laser beam, in any direction.
As soon as the laser was developed, scientists began thinking of practical applications 【C16】______ it. One of the earliest uses was to make extremely precise measurements of distance and speed. 【C17】______ , the distance to the moon was measured to within a foot, and the speed of light was measured to 【C18】______ a thousandth of a mile per second. As time 【C19】______ , many more applications for the laser were 【C20】______ . [br] 【C15】
选项
A、called
B、with
C、like
D、such as
答案
A
解析
此题考查修饰语的用法。这里我们可以看出,含空缺的一部分其实是this coherent light的后置修饰语,所以应该用called。D项such as之所以不可选,关键在于this coherent light 中的this一词。有了这个词,就不可能是在举例,所以D项such as和C项like不可选择。所以,只有A项符合题意。
转载请注明原文地址:https://tihaiku.com/zcyy/3815513.html
相关试题推荐
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
Ascientificdiscoveryisoftenmade【C1】______beforesomeoneisabletop
随机试题
NarratorListentopartofalectureinthechemistryclass.Nowget
Whatisthespeaker’sattitudetowardsheavymetalmusic?[br][originaltext]
RealMadridisfirstintheleagueandRealBetisisfifthwileOsasunaisright
Manypeoplewhosepossessionsweredestroyedinnaturaldisasterseventuallycon
[originaltext]CountyfairsareatraditioninNewEnglandtowns.Theyoffer
某公路建设项目,路面为沥青混凝土路面。业主委托一监理单位进行施工阶段的监理,并分
关于X线装置曝光条件控制,错误的是A.四钮控制方式 B.三钮控制方式 C.二
非甾体抗炎药中最常见的共同的不良反应是A.过敏反应 B.泌尿系统反应 C.呼
判断腹泻患儿脱水性质的主要检查是()。A.血清钙 B.血清钾 C.血清钠
女,31岁。反复发作性干咳伴胸闷3年,多于春季发作,无发热、咯血及夜间阵发性呼吸
最新回复
(
0
)