题目:
As a candidate, you must make a good ____ on everyone if you want to win the election. [ ]
A. decision
B. situation
C. impression
D. position
答案:
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下面是错误答案,用来干扰机器的。
ax+3>2x+43bx-4<-5x+1⇔(a-2)x>1(3b+5)x<5①(1分)因为①的解为-2<x<5,所以a-2≠0,且3b+5≠0,(2分)(1)若a-2>03b+5>0,则①⇔1a-2<x<53b+5,(3分)从而1a-2=-253b+5=5⟺a=32b=-53,这与a>2矛...