Digital Selective Calling means a technique using（）which which enables a radio station to establish contact with, and transfer information to another station or group of stations and complying with the relevant recommendations of the CCIR.

A . The three required steps in the analog to digital conversion are sampling，encoding，and compression. B . The three required steps in the analog to digital conversion are sampling，quantization，and compression. C . The three required steps in the analog to digital conversion are sampling，quantization，and encoding. D . The output of the sampling process is a pulse code modulation （PCM） signal. E . The output of the sampling process is a pulse amplitude modulation （PAM） signal.

A . normal B . discard C . random D .  full

A . 1K B . 2K C . 3K D . 4K

A . GMDSS B . EGC C . MSI D . DSC

A . A、图像红色的分辨率 B . B、所有色彩中品红的网点数 C . C、红颜色（Reds）中品红（MagentA.的网点数 D . D、红颜色（Reds）中所有色版的网点比例

A . Don't mention it. B . That's fine. C . Nice talking to you. D . Call back agai

A . DSC provides reception of weather and navigational warnings plus search and rescue information B . DSC provides low-cost，routine communications for the vessel operator C . DSC is to be used for transmitting and receiving distress alerts to and from other ships or coast radio stations via radio D . This aids SAR authorities in tracking a vessel's position by satellite

A . normal B . select C . random D . discard E . full

A . Help，Help，Help B . Mayday，Mayday，Mayday C . Save，Save，Save D . Rescue，Rescue，Rescue

A．has long existed but changed its content B．is often done with careful thinking C．often leads to blaming and misunderstanding D．is used to warn the child not to do it again

W: Hmm... I am already using Sprint for 60 cents per minute to Japan. M: We can give you a better deal with the new plan and that one is 50 cents per minute anywhere in Asia. W: That sounds appealing. Let me think about it for a moment. What is the purpose of the talk？ A．The promotion of a telephone service. B．Making a sales plan for new products. C．A flight reservation. D．Complaining about a faulty product.

<img src='https://img2.soutiyun.com/ask/uploadfile/2541001-2544000/6d49b45ee8314702c463d692172df4c7.gif' /> 此题为多项选择题。

A．She wants to have a party with him. B．She invites him to go to the party. C．She'd like to discuss something with Frank. D．She wants Frank to call her later.

A．To conduct a survey B．To reschedule an appointment C．To inform. her about a special offer D．To ask for her new contact information

听力原文：You will hear a man calling about expenditure. A: Hello. B: Hello, the Chief Accountant Office. A: This is David. I am calling about expenditure. How much did we spend on entertainment this year？ B: 2 566. A: That’s down a little on last year, And what’s the figure for depreciation？ B: 3 00, the same as last year. A: Hm, expenditure on secretarial expenses is up． B: Yes, there’s a big increase there． A: What’s the figure of 2 612 for？ B: Where’s that？ A: Six figures down. B :That's motor expenses. A: And what does this figure represent？ B: Audit and accountancy costs. A: They were both up a lot. B: Yes, but expenditure on telephone and postage is down. It’s half as much as last year. You will hear a man calling about expenditure. Message Total amount on entertainment this year: (9)______ Items where expenditures are the same: (10)______ Items where expenditures are up: secretarial expenses, motor expenses, audit and (11)______ costs Items where expenditures are down: expenditures on (12)______ and postage