过渡时，电弧稳定，飞溅小，成形良好，广泛用于薄板焊件的焊接和全位置焊接。
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In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.
A. the wind speed is greater here since the wind is traveling in the same general direction as the storm's track
B. the direction of the wind and seas might carry a vessel into the path of the storm
C. the seas are higher because of greater wind speed
D. All of the above
ISO11801规定100Ω双绞线直流环路电阻（）
A. 大于19.2Ω/100m
B. 小于19.2Ω/100m
C. 大于等于19.2Ω/100m
D. 小于等于19.2Ω/100m
车轮损伤的危害破坏踏面锥度，影响车轮的正常工作。
A. 正确
B. 错误
当混凝土强度等级为（）时，用非标准试件测得的强度值均应乘以尺寸换算系数。
A. ＜C30
B. ≥C30且≤C60
C. ≥C60
D. ＜C60
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