首页
登录
职称英语
A scientific discovery is often made【C1】______ before someone is able to pu
A scientific discovery is often made【C1】______ before someone is able to pu
游客
2023-11-23
77
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。有了这个问,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:http://tihaiku.com/zcyy/3211931.html
相关试题推荐
(1)Isthereanythingmoreboringthanhearingaboutsomeoneelse’sdream?And
Usually,therearetworeasonstopursuescientificknowledge:forthesakeof
Usually,therearetworeasonstopursuescientificknowledge:forthesakeof
Usually,therearetworeasonstopursuescientificknowledge:forthesakeof
Usually,therearetworeasonstopursuescientificknowledge:forthesakeof
Usually,therearetworeasonstopursuescientificknowledge:forthesakeof
Usually,therearetworeasonstopursuescientificknowledge:forthesakeof
Usually,therearetworeasonstopursuescientificknowledge:forthesakeof
ThescientificnameistheHoloceneAge,butclimatologistsliketocallour
PassageTwo[br]Whatdoestheword"they"in"thantheywerebeforethepan
随机试题
Thepurposeofthemeetingisto______.[br][originaltext]Okay,everybod
EntertainmentinLondonBuyingBoo
【B1】[br]【B10】A、chargeB、damageC、repairD、checkC语义衔接题[考频:22]。用排除法选出C)repair“修
A. B. C. D.
低渗性缺水时,体液的容量改变为A.细胞外液正常,细胞内液减少 B.细胞外液减少
患儿2岁,曾患过原发性结核病,近期发现颈淋巴结肿大伴发热,精神差食欲减退,消瘦.
某地级市医院于2001年10月对患者李某行胃大部切除,胃空肠吻合术。手术操作无误
具有活血止痛,行气解郁,凉血清心,利胆退黄功效的药物是A.丹参 B.川芎 C
如右图所示,一个边长为10厘米的正方体木块ABCD-A1B1C1D1,点E、F分
工程现场甲分包单位施工时长期占用现场唯一通道,导致乙分包单位物资材料无法及时进场
最新回复
(
0
)