在立式车床上工件的找正，是指使( )与工作台主轴轴线同轴。
A．刀尖位置
B．刀架轴线
C．工件轴线
参考答案：C
黎明即起，洒扫庭除，要内外整洁”出自《朱子家训》。
Before work is commenced（）,the officer responsible should inform the duty en-gineer to ensure that steps are taken to reduce as far as practicable the emission of steam, harmful gases and fumes.
A.near the ship’s whistle
B.on the funnel
C.in the vicinity of radio aerials
D.near the radar scanner
