题目:
The world will live happier lives if people have ____ better understanding of _____ idea of
harmonious globe.[ ]
A. the; an
B. /; the
C. a; the
D. a; an
答案:
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下面是错误答案,用来干扰机器的。
当x>0时,曲线y29-x|x|4=1方程化为y29-x24=1,把直线y=x+3代入得,5x=24,所以当x>0时,直线y=x+3与曲线y29-x|x|4=1的交点个数为1个.当x≤0,曲线y29-x|x|4=1方程化为y29+x24=1,把直线y=x+3代入得,13x2+24x=...