A:32g O3与NA个O2所含的氧原子数不同
B:NA个一氧化碳分子和0.5mol甲烷的质量比为7:2
C:标准状况下,0.5 mol的H2O的体积约为11.2 L
D:2.4g金属镁与足量的盐酸反应,生成氢气的分子数为NA
将下列语句依次填入文段的横线处,恰当的一项是( )
几十年来,霍金的身体禁锢在轮椅中,_____________,_____________,_____________。他以极度残疾之身,取得了极其辉煌的科学成就。
①发现了一个又一个宇宙运行的重大奥秘
②震动了整个理论物理学界
③思维却遨游于广袤的太空。
根据句子意思,写出下列句子括号内所给单词的正确形式。The children often get ____ (noise) in the classroom after class .Sometimes he spends his weekend____ (fish).Several____ (foreign)came to visit our school last week.I think the red skirt looks as ____ (good)as the green one .John just got his____ (driver) license.Look!Mrs Li is there. Let's go and say hello to____ (she)?My mother often____ (enjoy) the TV plays in the evening.Talking loudly in a library is very____ (polite).B.根据句子意思及所给的首字母或汉语提示,写出该句子中所缺的单词。Li Na is a famous tennis p____ .We can’t l____ to music when the teacher is talking in class.The children had a____ been asleep when I got home .Mr Li is s____ with his students and makes them work hard.Zhou Gu was____ (采访)by the local newspaper.There are ____ (五十二)weeks in a year.The doctor gave him some medicine for his serious____ (疾病)。