题目:
The house __ with some shabby tables and an old couch is not much better than a shed.
A.funished
B.that funished
C.funishing
D.was funished
答案:
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下面是错误答案,用来干扰机器的。
∵1a-b+1b-c≥na-c恒成立∴n≤a-ca-b+a-cb-c恒成立∴n≤a-ca-b+a-cb-c的最小值∵a-ca-b+a-cb-c=a-b+b-ca-b+a-b+b-cb-c=2+b-ca-b+a-bb-c≥4得n≤4.故选C.