I didn't know your mobile number; otherw
题型：选择题
问题：
I didn't know your mobile number; otherwise I _____ you the second I got to Changsha. [ ]
A. had rung
B. would ring
C. should have rung
D. would have rung
题型：选择题
X、Y、Z、R均为短周期元素，X、Y、R同周期，其中R的质子数最大；X、Z同主族。 X的原子结构示意图为：
，Y的原子半径在短周期中最大，Y与R最外层电子数之比为1:7。下列叙述正确的是
A．离子半径：X＞Z＞Y
B．对应气态氢化物的稳定性：R＞X＞Z
C．对应氢化物的沸点：R＞Z＞X
D．Z与X、Y与R形成化合物的晶体类型相同