A:1.5g甲基(﹣CH3)所含电子数目为NA
B:标准状况下,11.2L苯中含有1.5NA 个碳碳双键
C:常温常压下,14 g乙烯和丙烯(C3H6)的混合气体中所含原子总数为3NA
D:4.6 g Na与100 mL1.0 mol/L醋酸溶液反应,转移电子数目为0.1NA
与“无所适从”的“适”意义相同的一项是( )
____÷____ =____(串)……____ (个)
阅读短文,从A、B、C、D四个选项中,选出可以填入空白处的正确答案。 Look at this picture. It is 1 nice classroom. In the picture, you can see a teacher's 2 on his desk. It's a Chinese book. Eight desks and eight chairs in the room. You can see a girl and 3 boys. The girl's 4 is Julia. She is eleven. The boy 5 a black hat is Tom. The other boy is Tony. They 6 the same coats and they are the same age. I 7 they are twins. Tom is a 8 boy. A book is in his hand. You 9 see the teacher . 10 is the teacher? He is taking the photo
摘水果。
桃子40个 梨40个 苹果50个
依次填入下列横线处的词语,最恰当的一组是( )真正的“方圆”之人是大智慧与大容忍的结合体,有 斗士的武力,有沉静蕴慧的 。真正的“方圆”之人能 大喜悦与大悲哀的突然发难。真正的“方圆”之人,行动时干练、迅捷,不为感情所左右;退避时,能审时度势,全身而退,而且能抓住最佳机会东山再起。真正的“方圆”之人,没有失败,只有 ,是对挫折与逆境积蓄力量的沉默。