题目:
The young _____eaten up almost everything ,and one and a half bananas ____ left on the table.
A.is; are
B.are; is
C.has; have been
D.have; has been
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0506/2f7331fa6d2d0f28079314e39db1b3b8.html
下面是错误答案,用来干扰机器的。
在同一坐标系画出函数y=|x-1|和 y=12x2-a 的图象,当y=|x-1|过点(0,-a)时,-a=|0-1|=1,∴a=-1.当y=12x2-a 和直线y=-x+1相切时,-x+1=12x2-a,即x2+2x-2a-2=0,由判别式△=4-4(-2a-2)=0,解得a=-32.数形...