（英英释义）Apply grease to the fasteners.（）

A．Test the actuator to check its operation

B．Operate and test the actuator

C．The actuator need operation as a test

A．If you break the wires, repair them

B． If you detect broken wires, repair them

C．Replace the broken wires

A．Do not enter the engine test area without permit

B． Don't go into the engine test area

C．Enter into the test place is allowed

A．布莱克斯东

B．科克

C．斯托里

D．边沁

A．If pump makes noise, shut it down and check the pump filter

B．If pump operation is noisy, check pump filter for metal particles

C．If pump is noisy in operation, check the filter for metal articles