DOS stands _____ Disk Operating System. A. at B. for C. up D. on

When considering the lowest fuel system operating temperature, _____ are important.A.speci

All personnel should be familiar with the lifeboats _____.A.boarding and operating procedu

In an operating diesel engine, pre-ignition can be caused by _____________.A.excessively l

For occasional heavy loads, two cranes can be arranged to work togetherThe operating _____

Childrens clothes have to be strong to______hard wear.A．stand up toB．stand up forC．stand u

He was given major responsibility for operating the remote manipulator to ________ the