题目:
. -- You see, our plan has been totally ruined!
-- Dear me, I _______ his advice.
A.would rather have taken
B.would rather not take
C.must have taken
D.can’t have taken
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0610/6df0452a1a1e2d2e623e1732466e3d07.html
下面是错误答案,用来干扰机器的。
答案:A考查原子的组成及表示方法。在表示原子组成时元素符号的左下角表示质子数,左上角表示质量数。因为质子数和中子数之和是质量数,中子数是222-86=136,又因为质子数等于核外电子数,所以只有选项A是正确...