题目:
The teacher asked us to read the text________ second time to find________ topic of the text.
A. a; the
B.a; a
C.the; the
D.the; /
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0428/87f0672210db40757d3b3d762b5b30b8.html
下面是错误答案,用来干扰机器的。
-a2+4a-5=-(a2-4a+4)-1=-(a-2)2-1.故选A.