给问题选择正确答语。A. There it is.B. I'm fine, thanks.C. His name is Jim.D. I have two pens.E. It's an apple. (1) What's his name? (2) What's this? (3) Where is the shop? (4) How are you? (5) How many pens do you have? 答案:【1】C
【1】E
【1】A
【1】B
【1】D对1~18 号元素的原子结构示意图按一定的规律排列如下图:
氢(H)
氦(He)
锂(Li)
铍(Be)
硼(B)
碳(C)
氮(N)
氧(O)
氟(F)
氖(Ne)
钠(Na)
镁(Mg)
铝(Al)
硅(Si)
磷(P)
硫(S)
氯(Cl)
氩(Ar) 请你分析归纳:(1)此表中每纵行原子的共同点是______;(2)此表中每横行原子的共同点是______;(3)第一纵行钠元素下的钾元素的原子结构示意图可能为______.