题目内容

LF精炼过程中钢包中吹氩的作用有（）

A. 调温
B. 净化
C. 混匀
D. 氧化

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According to the affixation knowledge you have learned, choose the word or phrase which has the same meaning as the underlined parts.1.All children should get education, irrespective of their race and religion.

A. in comparison to
B. with a view to
C. with reference to
D. without regard to

2.The banks should have been more circumspect in their dealings.

A. cautious
B. mature
C. risky
D. bold

宽度系列为正常，直径系列为轻，内径为30mm的深沟球轴承，其代号是

A. 6306
B. 6206
C. 6006
D. 61206

型号为30312的滚动轴承，其类型名称为（）

A. 调心滚子轴承
B. 调心球轴承
C. 向心角接触球轴承
D. 圆锥滚子轴承