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【简答题】
Metabolism is the set of life-sustaining chemical transformations within the cells of organisms. means producing by metabolism. , of or relating to metabolism and , any substance involved in metabolism (either as a product of metabolism or as necessary for metabolism).
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【单选题】What is the heart of these hydraulic systems?
A.
the spindle
B.
the variable delivery pump
C.
the telemeter
D.
the floating lever
【简答题】常见的余弦辐射体有哪些?
【单选题】What is the heart of car business
A.
Products.
B.
Lean costs.
C.
Good quality and low cost.
【单选题】What is the heart of the lubrication system, which pulls oil up from the oil pan and makes the engine oil circulate through the engine.
A.
oil pump
B.
oil pressure relief valve
C.
oil filter
【简答题】假设链路的 MTU=2048 字节,若网络层的一个 IP 数据报总长度为 10000 个字节(使用固定首部),标识字段值为 12345 ,对其进行适当的分片,并说明每个分片的标识、标志以及片偏移字段的值。
【简答题】What is the heart of England?
【单选题】设有一室内低压蒸汽供暖系统，最不利管路长度为200m，若控制每米压力损失(比压降)为150Pa/m，则锅炉运行表压力应为( )。
A.
40kPa
B.
45kPa
C.
77kPa
D.
86kPa
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