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（）装配线；（）灭火器

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Conversation 2 8（）

A. She lost her data.
B. She broke the disc.
C. She bought a computer of a wrong model.
D. She couldn’t get her computer working.

Conversation 1 7（）

A. To work in an office．
B. To be an animal doctor．
C. To go abroad.
D. To be a salesman.

Having been badly damaged by the earthquake, the city has to be (rebuild) ________.

某次招标规定：与每个报价数之差的平方和最小的价格为“预中标价”，最接近“预中标价”报价的为预中标单位。6家单位投标，报价分别是37万元、62万元，61万元、47万元，49 万元、56万元，其“预中标价”是多少万元？( )

A. 51
B. 51.5
C. 52
D. 52.5