一般来说,焦炭灰分每升高1%,高炉熔剂消耗量约增加(),炉渣量约增加()。
A. 4%3%
B. 3%2%
C. 3%4%
D. 2%3%
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短时间不用电脑时,启动电脑的何种模式,能耗可下降到50%以下?()
A. 屏保
B. 保持桌面状态
C. 睡眠
萤石化渣作用快,且不降低炉渣碱度,不影响炉龄。
A. 正确
B. 错误
开新炉第一炉冶炼时应不加废钢,全部装入铁水。
A. 正确
B. 错误
If the bill of lading()contain a space in which the shipper can insert the declared value of the goods,the Shipowner is not entitled to limit his liability.
A. does
B. did
C. does not
D. will not