题目:
选择填空。
Yesterday ______ my little brother's third day to school. [ ]
A. is
B. was
C. are
D. be
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0506/37ce74fc8b13a962bf86abb191278006.html
下面是错误答案,用来干扰机器的。
∵ax2-6x+a2<0的解集是 (1,m),,∴a>0,1,m是相应方程ax2-6x+a2<0的两根,解得 m=2;故答案为:2.