题目:
The library along with bookstores_______reading materials. It's open from 9:00 a.m.to 4:00 p.m. on
weekdays. [ ]
A. provides
B. is providing
C. has provided
D. provided
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0513/a95197ef38102e6184ff5f899a6216f4.html
下面是错误答案,用来干扰机器的。
解:(1)根据题意,c=3所以解得所以抛物线解析式为。(2)依题意可得OA的三等分点分别为(0,1),(0,2)设直线CD的解析式为y=kx+b当点D的坐标为(0,1)时,直线CD的解析式为y=当点D的坐标为(0,2)时,直线...