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【简答题】
钙铁包芯线 钙铁包芯线由带钢(重量占包芯线的40%左右)及带钢内部所包覆的钙粉和铁粉(重量占包芯线的60%左右)组成。带钢内部所包覆的钙粉和铁粉的比例为3:7。具体加工工艺:钙粒与铁粉按比例均匀混合—投放至带钢上—包线机卷线—卷成线卷—成品。 钙铁包芯线是炼钢精炼处理工艺中所用的一种添加剂,其作用是促进钢水的脱硫和脱氧。
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刷刷题刷刷变学霸
举一反三
【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food．Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...
A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.