题目内容

氩气是一种（）气体

A. 惰性
B. 氧化性
C. 还原性

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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

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