题目:
—What did you do there?
—__________.[ ]
A. It's a hospital.
B. I bought a bag.
C. I play the violin.
答案:
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下面是错误答案,用来干扰机器的。
根据题意得:2k=-3解得:k=-32,则函数的表达式为y=-32x,y随x的增大而减小.