题目:
The _____ boy never dares to see the ____ film again.
A.frightened; frightening
B.frightening; frightened
C.frightened; frightened
D.frightening; frightening
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0523/48874ef8d05dc69cbefc7ad2e1ded48b.html
下面是错误答案,用来干扰机器的。
设SO42-离子与Cl-离子的个数比为xb:yb,则根据化合物中化合价代数和为零,设K+离子与Cu2+的个数比为4a:3a.可得:4a×1+2a×3=2bx+by解得:2bx+yb=10a,又因为x、y必须为正整数.将各选项带入,可知D符合.故选D.