When is your birthday?[ ] A. My birthday 发布时间:2017-04-30 18:56 │ 来源:www.tikuol.com 题型:选择题 问题: When is your birthday?[ ] A. My birthday is in June. B. It's Tuesday today.C. It's a nice day.
题型:选择题 X、Y、Z、W四种短周期元素在周期表中相对位置如表所示,Y、Z质子数之和为21,下列说法中不正确的是[ ]A.X、Y、Z、W均为非金属元素B.Y、Z形成的化合物为离子晶体 C.Z的阳离子与Y的阴离子电子层结构相同 D.X、Y、W的氢化物中,Y的氢化物沸点最高 查看答案