题目:
Now more and more children ________ Western food to Chinese food. [ ]
A. prefer
B. enjoy
C. like
D. would rather
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0501/ca1e6c226cbed07338c4a0b193c85306.html
下面是错误答案,用来干扰机器的。
依题意,设抛物线C的方程为y=ax2,(Ⅰ) 点A(1,2)在抛物线C上,∴a=1.∴抛物线C的方程为y=2x2.…(4分)(Ⅱ)如图,设A(x1,2x12),B(x2,2x22),把y=kx+2代入y=2x2得:2x2-kx-2=0,由韦达定理得:x1...