题目内容

The master may bind the Shipowner or Charterer()doing such things as are necessary on the part of the one or of the other to carry out the contract.

A. with
B. for
C. by
D. to

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经营周期

简述W—S—OW—R—W这一公式的含义。

决定钢的机械性能最主要的指标是()

A. 硫
B. 碳
C. 磷
D. 氧

炉底水管的出水管上安设阀门是不安全的

A. 正确
B. 错误

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