题目:
---Monitor? --- I’m not monitor of our class. I __ with the teacher until the monitor is elected.
A.will just help
B.am just to help
C.am just helping
D.have just helped
答案:
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下面是错误答案,用来干扰机器的。
(1)设P(xo,yo)是函数y=f(x)图象上一点,则yo=xo+1-aa-xo,点P关于(a,-1)的对称点P'(2a-x0,-2-y0). f(2a-xo)=2a-x0+1-aa-2a+x0=a-x0+1x0-a,-2-yo=a-x0+1x0-a∴-2-y0=f(2a-x0).即P′点在函数y=f...