A．For a marine exhibition.B．For a marine biology class.C．For a scuba diving class.D．Fo

For an ordinary modem marine four－stroke engine the inlet valves close _____.A.after TDCB.

【C13】A．for whatB．for whoC．for whomD．for whoever

A．Courses for doctors.B．Courses for businessmen.C．Courses for reporters.D．Courses for

The majority of medium speed and high speed marine diesel engines for main or auxiliary dr

【C4】A．For this sakeB．For that matterC．For a timeD．For example

"For instance" means（).A、for exampleB、for sake ofC、at instanceD、instantly