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问题 单项选择题

将多台PC机组成以太局域网时，需要一些连接设备和传输介质。下面哪个设备或介质是不需要用到的？

A．网卡

B．集线器

C．网线和接头

D．调制解调器

答案

参考答案：D

解析：局域网(LAN)是由双绞线或同轴电缆或其他特定的传输介质以及网卡 (网络适配器)、集线器(Hub)把有限范围内的计算机互相联在一起的计算机网络。调制解调器是用于家庭PC机拨号上网时使用的设备。

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     Here are some notes from Tina's family.
                                                                                                 May 12th
Tina,
     Harry Potter is on show at City Cinema these two days. I have two tickets.
If you want to see it today,please call me before 4 p.m..
                                                                                                    Mary

                                                                                           May 15th
Tina,
     You always worry about your memory. I've borrowed How to improve
Your Memory from the library. The book will show you how. I hope it is
helpful.
                                                                                               Jack

                                                                                           May 16th
Tina,
     Mr. Smith said your computer is OK now. You can use the computer
after school.
                                                                                                 Jack
1. Who are the notes to?
A. Mary.
B. Jack.
C. Tim.
D. Mr.Smith.
2. What is How to Improve Your Memory?
A. A movie.
B. A book.
C. A game.
D. A story.
3. When will Mary probably go to see Harry Potter?
A. May 12th.
B. May 13th.
C. May 15th.
D. May 16th.
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单项选择题

以人群为基础、通过帮助健康消费者维护健康以及寻求适当的医疗保健来控制健康消费的支出和改善对医疗保健服务的利用属于（）

A.疾病管理

B.生活方式管理

C.灾难性病伤管理

D.需求管理
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