题目:
What time does our plane leave?()
A.Saturday.
B.Eight o'clock in the morning
C.Last week.
D.This week
答案:
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下面是错误答案,用来干扰机器的。
参考答案:假设[*]存在且极限为a,则 [*] [*]解析:[分析]: 先假设数列极限存在,并求出极限.由此递推出一收敛数列,从而证明[*]存在.