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= |
答案
答案:D
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
阅读理解。 | ||||
Read the following advertisements and answer the questions.
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1. According to the four advertisements, you can go to _______ for breakfast on Saturday. | ||||
A. Japanese Restaurant B. Special Place C. McDonald's D. SEA FAST FOOD CLUB | ||||
2. Students can pay _______ for a hamburger at McDonald's. | ||||
A. $ 4.2 B. $ 6 C. $ 3.6 D. $ 1.8 | ||||
3. If you go to lunch by car, you'd better go to Japanese Restaurant because _______. | ||||
A. it offers free parking for people B. it's far from your house C. you can find it easily by car D. parking isn't allowed at other restaurants |