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
2023-11-19
62
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] 【C6】
选项
A、with
B、in
C、to
D、from
答案
A
解析
此题考查介词用法。这里应该选A项with。with的这种用法其实也表示一种特殊的“伴随”,常常用于举例。例如:The same is true with/of you.
转载请注明原文地址:https://tihaiku.com/zcyy/3200942.html
相关试题推荐
WhyhasthereturnofDiscoverybeendelayedfor24hours?[br][originaltext]
Manystudentsownacompanybeforetheirgraduation.What’syouropinionont
Nowadaysgroupsofscientificworkers,often【C1】______bytheirgovernments
Nowadaysgroupsofscientificworkers,often【C1】______bytheirgovernments
Nowadaysgroupsofscientificworkers,often【C1】______bytheirgovernments
Nowadaysgroupsofscientificworkers,often【C1】______bytheirgovernments
Nowadaysgroupsofscientificworkers,often【C1】______bytheirgovernments
Nowadaysgroupsofscientificworkers,often【C1】______bytheirgovernments
Nowadaysgroupsofscientificworkers,often【C1】______bytheirgovernments
Nowadaysgroupsofscientificworkers,often【C1】______bytheirgovernments
随机试题
Mr.Greyhastwosons,______arefamousdancers.A、boththeyB、bothofthemC、the
Questions29-40•Readtheinformationaboutthecommunicationofinformat
INTHEBEDROOMDon’tsmokeinbed—itcausesabout1
[originaltext]W:So,howarethingsgoing,Steve?M:Well,tobehonest,Carla,
ImprovingYourT.Q.(Test-TakingQuotient)TypesofTests
大学建筑系教授通过了注册建筑师考试,他可以申请注册的单位是( )。A.本地某国
关于盆腔的描述,错误的是A.前方为膀胱颈部和前列腺底部 B.后方为直肠 C.
增值税一般纳税人销售的下列货物中,适用9%税率的是()。A.化妆品 B.钢
(2018年真题)下列()管理的不到位,可引发流动性风险。A.声誉风险 B.
甲公司2×18年9月20日支付银行存款3000万元取得一项固定资产,其中包括一台
最新回复
(
0
)