单项选择题
A.more than the working temperature B.less than the working temperature C.the working temperature D.the same as the surrounding temperature
A: Please tell me the specifications and quantity. B: （...
A: Please tell me the specifications and quantity. B: （）
A.Pump diesel oil first B.300 tons of 180 cst fuel oil C.The figure is all right D.OK, I’ll sign it
A variable pitch propeller is made （） a boss with separ...
单项选择题A variable pitch propeller is made （） a boss with separate blades mounted into it.
A.of B.up of C.from D.out
A single piece（） fitted with bronze rings guides the pi...
单项选择题A single piece（） fitted with bronze rings guides the piston in the cylinder liner.
A.piston skirt B.piston crown C.guide way D.cross-head
