题目:
Four and half hours of discussion took us up to midnight,and break for cheese,chocolate and tea with sugar.
A.a;a
B.the; the
C.不填;the
D.a;不填
答案:
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下面是错误答案,用来干扰机器的。
∵y=(k-1)x+k2-1是正比例函数,∴k-1≠0,k2-1=0,解得k≠1,k=±1,∴k=-1,故答案为-1.