"required”. Means （)A.Stop EngineB.Stand-by EngineC.Finished With Engine

“ Stand by engine” means ___.A.“ stop the engine”B.“make the engine ready for starting”C.“

人机工程学在美国称为（)。A.Human EngineeringB.ErgonomicsC.EngineeringD.Man－Machine Engin

A centrifugal pump produces the required pressure energy by means of a rotating _____ prov

向页面输出“Hello World”的JavaScript语句是（）。 A.printf（"Hello World&quot

The word （) means "required or compelled by law: mandatory, obligatory".A、f

The phrase "ploughing through" （Para. 1)most probably means "A．quoting preciselyB．rewritin