问题
选择题
| 2002年诺贝尔物理学奖中的一项，是奖励美国科学家贾科尼和日本科学家小柴晶俊发现了宇宙X射线源．X射线是一种高频电磁波，若X射线在真空中的波长为λ，以h表示普朗克常量，c表示真空的光速，以E和m分别表示X射线每个光子的能量和质量，则（ ） A．E= B．E= C．E= D．E= |
，m=0
，m=
，m=0
，m=
答案
答案：D
搜题请搜索小程序“爱下问搜题”
| 2002年诺贝尔物理学奖中的一项，是奖励美国科学家贾科尼和日本科学家小柴晶俊发现了宇宙X射线源．X射线是一种高频电磁波，若X射线在真空中的波长为λ，以h表示普朗克常量，c表示真空的光速，以E和m分别表示X射线每个光子的能量和质量，则（ ） A．E= B．E= C．E= D．E= |
答案：D
| 完形填空。 | |||
| A man was exploring some caves by the seashore．In one cave he __1__a bag of hardened clay balls．It seemed that someone had __2__some clay and baked the balls in the sun．They didn't look like __3__ things,but they interested him,__4__ he took the bag out of the cave with him． As he walked along the beach he __5__ the clay balls one at a time out into the ocean as far as he could．He thought __6__ about it until he dropped one of the balls and it cra  cked open on a rock．__7__was a beautiful,precious stone．__8__,the man started breaking open the remaining clay balls．__9__contained a similar treasure．He found thousands of dollars'worth of jewels in the 20 or so clay balls he had __10__,and then it struck him:__11__thousands of dollars in treasure,he could have had tens of thousands,with the 50 or 60 clay balls with their __12__treasures which were now in the ocean．He just __13__the chance． Sometimes it's like that with __14__．When we look at a person,we usually only see "the outside clay shell"．It isn't always beautiful or shining,so we __15__ the person；w  e see him as less important than someone more beautiful or more __16__．But we haven't taken the time to look for the __17__ inside that person．If we spend the time getting to know that person,the clay will __18__ and the brilliant jewel will shine．We are __19__ made,not only with our physical bodies,but also with our spiritual selves,which are sometimes hidden __20__ others by the "earthen shell" | |||
| ( )1．A．searched ( )2．A．rolled ( )3．A．dangerous ( )4．A．while ( )5．A．pushed ( )6．A．little ( )7．A．Out ( )8．A．Moved ( )9．A．Each ( )10．A．given ( )11．A．In case of ( )12．A．hidden ( )13．A．forgot ( )14．A．money ( )15．A．pity ( )16．A．warm-hearted ( )17．A．clay ( )18．A．come off ( )19．A．normally ( )20． A．from | B．lost B．pressed B．valuable B．though B．put B．long B．Inside B．Satisfied B．Much B．taken B．In return for B．obvious B．missed B．life B．blame B．honest B．treasure B．break away B．gradually B．behind | C．made C．dug C．annoying C．if C．threw C．hard C．Next C．Worried C．None C．left C．Instead of C．well-known C．abandoned C．people C．ignore C．famous C．ball C．run out C．wonderfully C．with | D．found D．cut D．ordinary D．so D．pulled D．well D．Below D．Excited D．Few D．dropped D．Because of D．question able D．faced D．friends D．hate D．stylish D．shell D．dry up D．expensively D．by |