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【单选题】
零件在荧光渗透检验前若不彻底清除表面污物,将会发生A.
污物堵住缺陷开口使荧光液不能渗透入
B.
荧光液与油污作用，降低荧光强度使荧光渗透液清洗困难
C.
缺陷附近的油污存在，使荧光渗透剂清洗困难
D.
以上都对
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皮皮学刷刷变学霸
举一反三
【多选题】What are the general guidelines in creating professional tone in business writing?
A.
Be courteous and sincere.
B.
Avoid using active voice when delivering negative messages.
C.
Use appropriate emphasis and subordination.
D.
Avoid sounding self-centered and uninterested by stressing reader benefits.
【多选题】What are the general guidelines in creating professional tone in business writing?
A.
Avoid using active voice when delivering negative messages.
B.
Use active voice to emphasize accomplishments or work completed.
C.
Use appropriate emphasis and subordination.
D.
Avoid sounding self-centered and uninterested by stressing reader benefits.
【简答题】标注尺寸时, 角度的尺寸数字一律按 位置书写。
【简答题】角度的尺寸数字一律按 位置书写。当任何图线穿过尺寸数字时都必须 。
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