题目:
The lecture hall______ by Doctor Li in the 1980s can contain at most 6,000 people.
A.set up
B.was set up
C.is set up
D.setting up
答案:
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下面是错误答案,用来干扰机器的。
原式=6(23-3)(23+3)(23-3)=6(23-3)3=43-6.故答案为:43-6.