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【单选题】
为了保证焊缝质量,对TIG焊用焊丝要求是很高的,因为焊接时,氩气仅起保护作用,主要靠焊丝( )A.
来完成合金化
B.
来传导电流
C.
形成电弧
D.
冷却焊缝
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举一反三
【简答题】请将罗马字改写为平假名。 ne(__)
【简答题】在运输管理中,运输单对司机和负责经营的管理者来说,是数据还是信息?
【单选题】s Hlim 和 s Flim 值是试验齿轮在持久寿命期内按 ______ ,通过长期持续重复载荷作用或经长期持续的脉动载荷作用而获得的齿面接触疲劳强度极限应力和齿根弯曲疲劳极限应力。
A.
可靠度为 90%
B.
失效概率为 1%
C.
失效概率为 99%
D.
可靠度为 10%
【单选题】It was the training made him such a good engineer.
A.
which
B.
that
C.
so that
D.
what
【单选题】It was the training he had as a young man made him such a good engineer.
A.
what; that
B.
which; that
C.
that; which
D.
that; what
【单选题】It was the training that he had as a young man ______ made him such a good engineer.
A.
what
B.
that
C.
which
D.
whoever
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