When sending and receiving messages on the marine radio，confusion over unusual words can b

For data transmission to be successful，sending and receiving devices must follow a set of

When sending emails to professionals, you should take the time to check your message

Both fax and email enable people to receive messages and important information immedi

【C9】______A．receivingB．sendingC．receiveD．send

Sending out a mass email when asking for help is______.A．of great efficiency and successB．

Immediately the radio message was received, three ships changed their______and made their