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在Excel 2010中按下列要求建立数据表格和图表: 成分 含量 比例 碳 0.02 氢 0.25 镁 1.28 氧 3.45 具体要求如下: 1) 将下列某种药品成分构成情况的数据建成一个数据表(存放在A1:C5的区域内),并计算出各类成分所占比例(保留小数点后面3位),其计算公式是: 比例=含量(mg)/含量的总和(mg) 2) 对建立的数据表建立分离型三维饼图,图表标题为“药品成分构成图”,并将其嵌入到工作表的A7:E17区域中。 3)完成后文件名保存为学号+姓名,上传系统
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【单选题】A large, low-speed, main propulsion diesel engine uses sea water to directly cool the _____.
A.
cylinder heads
B.
exhaust valves
C.
scavenging air
D.
injectors
【单选题】Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by _______
A.
increasing the quantity of starting air
B.
increasing the lube oil pressure
C.
heating the engine fuel supply
D.
heating the engine coolant
【单选题】The main function of tie rods in the construction of large, low speed diesel engines is to _____.
A.
stiffen the bedplate in way of the main bearings to increase the engines longitudinal strength
B.
accept most of the tensile loading that results from the firing forces developed during operation
C.
mount the engine frame. securely to the hull to prevent shaft coupling misalignment
D.
connect the crosshead solidly to the piston rod
【单选题】下列关于利润责任中心的说法中，错误的是（）
A.
拥有供货来源和市场选择决策权的责任中心，才能成为利润中心
B.
考核利润中心的业绩，除了使用利润指标外，还需使用一些非财务指标
C.
为了便于不同规模的利润中心业绩比较，应以利润中心实现的利润与所占用资产相联系的相对指标作为其业绩考核的依据
D.
为防止责任转嫁，正确考核利润中心业绩，需要制定合理的内部转移价格
【单选题】One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.
A.
the extra weight required for the diesel reduction gearing
B.
a minimum speed for the engines that limits the minimum speed of the vessel
C.
the higher fuel consumption per SHP
D.
the low efficiency of the system when a controllable pitch propeller is used
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