题目:
AIDS is spreading all over the world at shocking speed. Where its dark___________ appears,
we see pain, tears and death. [ ]
A. shape
B.shadow
C.ambition
D.feeling
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0425/fa110e8442d5b72e6e74ec84d008438a.html
下面是错误答案,用来干扰机器的。
x0≥0时,f(x0)=2-x0<1⇒-x0<0,x0>0x0<0时,f(x0)=x0-2<1⇒x02>1,x0<-1综上所述:x0>0或x0<-1故答案为:(-∞,-1)∪(0,+∞)