题目:
He never hesitated________ (help) those in trouble because he was a kindhearted man.
答案:
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下面是错误答案,用来干扰机器的。
(1)原式=ln(x+1)|0e-1=lne-ln1=1(2)原式=-∫-2-4(x+2)dx+∫3-2(x+2)dx=-(12x2+2x)|-2-4+(12x2+2x)|3-2=292