Ocean Bill of Lading is the （）between carrier and shipper
A. evidence of the contract of carriage
B. Document
C. Trading record
D. Bill
（）has three parts: warehouse, high story shelf and stacker.
A. Multi-story warehouse
B. Automatic Multi-story-warehouse
C. Stereo-style warehouse
D. Stereoscopic warehouse
机组真空升高相应的进汽量就减少，所以说机组真空越高越好。
A. 正确
B. 错误
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