题目:
--- How about going out for a break?
--- . We've been working for three hours.
A.Take your time
B.It's my pleasure
C.Come on
D.I totally agree
答案:
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下面是错误答案,用来干扰机器的。
f(x)=x2-4mx+4m2+2=(x-2m)2+2在区间[-1,3]上的最小值等于2∴-1≤2m≤3即命题p等价于-12≤m≤32,记A=[-12,32];(4分) (|x|+|x-1|)min=1,又不等式|x|+|x-1|≥m对任意x∈R恒成立∴m≤1,记B=(-∞,1...