对于炼钢过程而言,其首要任务是()。A.脱磷、硫 B.脱氧 C.脱碳

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问题:

对于炼钢过程而言,其首要任务是()。

A.脱磷、硫

B.脱氧

C.脱碳

考点:炉外精炼工初级炉外精炼工初级炉外精炼工题库
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反渗透系统前加还原剂的作用是什么?

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巴豆采用

A.油炙
B.蛤粉炒
C.烘焙法
D.密闭煅
E.制霜法

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针对铁-碳合金回答下列问题:

已知低碳钢常在920℃左右进行气体渗碳。请解释选择这一温度的原因。

题型:单项选择题

下列属于脑内肿瘤征象是()

A.邻近颅板增生

B.脑白质挤压征

C.邻近颅板破坏

D.瘤周水肿

E.脑沟增宽

题型:单项选择题

The Simple Network Management Protocol (SNMP)is an (66) protocol that facilitates the exchange of management information between (67) . It is part of the Transmission Control Protocol/Internet Protocol(TCP/IP) protocol suite. SNMP enables network (68) to manage network performance, find and sole network problems, and plan for (69) An SNMP -managed network consists of three key components: managed devices , (70) ,and network -management systems .

A. network stations B. network clients C. network devices D. network servers

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