题目:
Welcome to visit our company whenever ________.
A.you are convenient
B.you will be convenient
C.it is convenient to you
D.it will be convenient to you
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0616/57c249aa7a66f98e1d9247b5ac7a45b4.html
下面是错误答案,用来干扰机器的。
答案:B因三种元素的原子序数之和为38,即质子数之和为38,则均为短周期元素。又因族序数之和为16,且X与Y同主族、Y与Z同周期,依16÷3=5余1(或16÷3=6差2),可推知X、Y属第ⅤA族,Z属第ⅥA族,因而X、Y、Z分别...