The "cloak" scientists have invented

admin2014-07-20 15

问题 The "cloak" scientists have invented

Scientists have created the first device to render an object invisible in three dimensions. The "cloak" hid an object from detection using light of wavelengths close to those that are visible to humans. Previous devices have been able to hide objects from light traveling in only one direction; viewed from any other angle, the object would remain visible. This is a very early but significant step towards true invisibility cloaks.

选项 A、can keep an object invisible in three dimensions.
B、can hide an object from detection only in one direction.
C、is a true invisibility cloak.
D、is just a minor achievement.

答案A

解析

转载请注明原文地址:https://kaotiyun.com/show/33TK777K

专业英语四级

相关试题推荐

Parkourisaphysicalactivitythatisdifficulttocategorize.Itisnotanextremesport,butanartordisciplinethatresemb
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor
Accordingtotheconversation,RuthcallsTimbecause
Howshouldcheerleadingbeviewedaccordingtothepassage?
Atschoolwewentoveroursocialnetworkingguidelines.(1)_____theobvious—don’tbeinappropriatewithstudentsthroughtextin
Thedifferencesbetweenmenandwomen(1)_____whytheyhavedifferentexpectationsaboutcommunicationinmarriage.Forwomen,
Theseniorlibrarianatthecirculationdeskpromisedtogetthebookforme______sheshouldrememberwholastborrowedit.
In______withourrulesandregulations,Iamcallingameetingofourorganization.
Youknowyouhavetoread"betweenthelines"togetthemostoutofanything.Iwanttopersuadeyoutodosomethingequallyim
ItisabsolutelyessentialthatWilliam_____hisstudyinspiteofsomelearningdifficulties.

随机试题

在中国革命过程中，具有新民主主义革命和社会主义革命双重性质的事件是()。
确定常住单位的基本标志是()
“_______”，即一种“文明系统”，系统中的诸多国家享有基本共同的传统文化属性、文化特征，但它并不排斥现代性下的普适性和多元性；在强调同质性的同时，并不否认异质性。
Thesyntheticvitaminsareidentical______thosenaturallypresentinourfood.
当前进行城市地下空间资源开发与利用的重点是()。
监理单位承揽到监理业务后，应当由项目监理机构相继编写的监理工作文件是(　　)。
施工现场固体废物的处理方法主要有(　)。
我国古代对文学活动中作者这一基本要素不重视，无名氏的作品很多。()
设非负函数y=y(x)(x≥0)满足微分方程xy"-y’+2=0．当曲线y=y(x)过原点时，其与直线x=1及y=0围成的平面区域D的面积为2，求D绕y轴旋转所得旋转体的体积．
NoteveryPresidentisaleader,buteverytimeweelectaPresidentwehopeforone,especiallyintimesofdoubtandcrisis.I

最新回复(0)

The "cloak" scientists have invented

专业英语四级

Parkourisaphysicalactivitythatisdifficulttocategorize.Itisnotanextremesport,butanartordisciplinethatresemb

Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor

Accordingtotheconversation,RuthcallsTimbecause

Howshouldcheerleadingbeviewedaccordingtothepassage?

Atschoolwewentoveroursocialnetworkingguidelines.(1)_____theobvious—don’tbeinappropriatewithstudentsthroughtextin

Thedifferencesbetweenmenandwomen(1)_____whytheyhavedifferentexpectationsaboutcommunicationinmarriage.Forwomen,

Theseniorlibrarianatthecirculationdeskpromisedtogetthebookforme______sheshouldrememberwholastborrowedit.

In______withourrulesandregulations,Iamcallingameetingofourorganization.

Youknowyouhavetoread"betweenthelines"togetthemostoutofanything.Iwanttopersuadeyoutodosomethingequallyim

ItisabsolutelyessentialthatWilliam_____hisstudyinspiteofsomelearningdifficulties.

在中国革命过程中，具有新民主主义革命和社会主义革命双重性质的事件是()。

确定常住单位的基本标志是()

“_______”，即一种“文明系统”，系统中的诸多国家享有基本共同的传统文化属性、文化特征，但它并不排斥现代性下的普适性和多元性；在强调同质性的同时，并不否认异质性。

Thesyntheticvitaminsareidentical______thosenaturallypresentinourfood.

当前进行城市地下空间资源开发与利用的重点是()。

监理单位承揽到监理业务后，应当由项目监理机构相继编写的监理工作文件是( )。

施工现场固体废物的处理方法主要有( )。

我国古代对文学活动中作者这一基本要素不重视，无名氏的作品很多。()

设非负函数y=y(x)(x≥0)满足微分方程xy"-y’+2=0．当曲线y=y(x)过原点时，其与直线x=1及y=0围成的平面区域D的面积为2，求D绕y轴旋转所得旋转体的体积．

NoteveryPresidentisaleader,buteverytimeweelectaPresidentwehopeforone,especiallyintimesofdoubtandcrisis.I

监理单位承揽到监理业务后，应当由项目监理机构相继编写的监理工作文件是(　　)。

施工现场固体废物的处理方法主要有(　)。