征管软件税源管理模块中项目开票窗口入库、退库查询可以按下列哪些条件进行查询（）
A. 项目编码
B. 微机编码
C. 电脑票号
D. 字轨税票号码
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PCB中对设计验证中高速验证下[ElectrodynamicCheck]对话框中选择“TCK”网络说法正确的（）。
A. [CheckImpedance]验证阻抗
B. [CheckDelay]验证直线长度
C. [CheckLoops]验证回路
The required fireman’s outfits required for ship’s are not to be used for any other purpose EXCEPT for the（）.
A. oxygen and explosion meter when it is used for detection of flare gases
B. self-contained breathing apparatus，when used as protection from gas leaking from a refrigeration unit
C. boots and gloves that are made of rubber or electrically non-conductive material，if used when repairing electrical equipment
D. lifeline，if used by personnel entering a compartment which might be deficient of oxyge
电焊机的外壳应可靠接地或接零。接地时其接地电阻不得大于（）。不得多台串联接地。
A. 4
B. 10
C. 15
D. 20
个体工商户可以委托他人代办验照吗？应提交哪些文件？
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