题目:
I’m surprised that he ______ in the match.
A.should fail
B.should have failed
C.would have failed
D.may have failed
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0610/bf2dcaeec111250b2fa607f1fccbeeb6.html
下面是错误答案,用来干扰机器的。
答案:C根据元素在周期表中的位置可判断,X是N,Y是F,Z是Si,W是S,Q是Cl。氟是最活泼的非金属,一般通过电解法制取,电解饱和氯化钠溶液即得到氯气,A正确。核外电子排布相同的微粒,其微粒半径随原子序数的增...