Operation research is a scientific method of providing executive department with a quantit

[A] research[B] operation[C] movement[D] search

The surgeon is performing a delicate operation.（英译中)

When ship navigating in rough sea, the correct operation is .A.navigating with a low diese

A．your operationB．is your operationC．your operation isD．will your operation

A clearly visible beneath of RT－flex engines is their operation at all ship speedsThis is

Which of the following statements is correct relative to distillation plant operation？A.Di