A．Movies with sound,B．Nylon.C．The radio.D．The computer.

Which is NOT a distress signal （).A.A continuous sounding with any fog signal apparatusB.A

The author of the passage is primarily concerned with ______.A．evaluating the soundness of

The fact that Chinese characters are associated with ideas, not sound, would make it a fin

If the air stream meets with no obstruction when a sound is pronounced, it is a（n)A．voiced

Which of the following sounds most polite？A.Could you help me with this assignment？B.I

He 【was obsessed with 】American horror movies.A.