外部数据包经过过滤路由只能阻止（）唯一的ip欺骗A、内部主机伪装成外部主机IP B、

【问题1】 Samba的工作原理是：让 (1) 和NetBIOS这两种协议运行于TCP/IP通信协议之上，且通过Windows的 (2) 协议让用户的Linux计算机可以在Windows的网络邻居上被看到。 Samba服务器配置工具是用来管理Samba共享、用户及基本服务器设置的图形化界面。它修改/etc/samba/smb.conf目录中的配置文件。要使用该配置工具，用户必须运行XWindow系统，以root根用户身份登录月．安装了Redhat-config-samba RPM软件包。在shell提示符下键入 (3) 命令。

— Where is Dave?  — I don't know. Look! He is               the desk.  [ ]

A. in           

B. out         

C. under

Active vacations are often the most relaxing of all. But Wait! It's all in defining what an active vacation is. We don't expect you to take up jogging, backpacking, or hang gliding. we ask the sedentary（爱坐的）vacationers to spend two to four hours a day doing things, such as walking the city streets, exploring a nature preserve, or taking a leisurely rowboat ride.

These kinds of activities aren't just good for your physical health. They improve your mental health, even your spiritual health. And they make vacations memorable and worthwhile. Here are some fresh ideas for active and healthy vacation.

Make the morning your activity time. At that time it is most likely that the weather will be friendlier, your energy level higher, and your schedule emptier than later in the day.

Have a walk at dawn or dusk. Such activity is called rejuvenation（恢复活力）. Try to make this a daily routine of life away from home, and you will guarantee yourself both physical and spiritual youth.

Get into the water as much as you can. Don't allow yourself to spend your entire time sitting in front of the water. Whether it is the ocean, a swimming pool, or a tree-lined lake, make sure you get into the water for swimming or games or even walking. Merely standing in waist-high water is a good workout, thanks to the action of the water. And you'll feel so much more alive!

Choose a cruise for your trip. It's amazing how active you can be being stuck on a boat in the middle of the Atlantic. Most cruise ships offer numerous options for seaworthy exercise. During your sea and land trips you can burn calories as you swim, hike, dive, and horseback ride.

Get out of the car every two hours. Many of us spend a large part of our vacations on the road, either getting to and from our destinations, or using the car for sightseeing. But no matter how beautiful the scenery is, great and memorable vacations don't happen in a car seat. Don't wait for tiredness or nature's call to get you to pull over. Frequently get out and stretch, walk, picnic, shop, visit, and have fun. It's important for your health and energy, and it makes traveling a lot more active and interesting.

小题1:The first paragraph mainly tells us ____________.

A．that active vacations are very relaxing

B．the activities we should join in

C．how many hours we should exercise every day

D．what an active vacations is小题2:How many tips does the writer give in the passage?

A．Three

B．Four

C．Five

D．Six小题3:Which of the following is WRONG according to the passage?

A．Usually the weather in the morning is better.

B．You can have a memorable vacation in a car.

C．Swimming can make you feel much more alive.

D．Don’t drive your car very often to go sightseeing.小题4:Which of the following is probably the best title for this passage?

A．Driving Tips

B．How to Relax Without cars

C．Give up Your Car and Walk

D．Make your Vacation Healthy

高科V2060最大支持（）.

A、60个接口

B、20个接口

C、20门电话

D、60门电话

何种射线可致白内障（）

A．紫外线

B．可见光

C．微波

D．红外线

E．X线和γ射线