问题 单项选择题

VLAN在现代组网技术中占有重要地位。在由多个VLAN组成的一个局域网中,以下哪种说法是不正确的

A.当站点从一个VLAN转移到另一个VLAN时,一般不需要改变物理连接

B.VLAN中的一个站点可以和另一个VLAN中的站点直接通信

C.当站点在一个VLAN中广播时,其他VLAN中的站点不能收到

D.VLAN可以通过MAC地址、交换机端口等进行定义

答案

参考答案:B

解析:不同VLAN中的站点不能直接通信。

阅读理解

How Can Excess Weight Hurt Your Health?

It's hard to feel good when your body has too much weight to carry. Being overweight or obese can make it harder to breathe and sleep. It can make a person feel tired and cause aches or pains. A weight problem also can make you embarrassed, sad, or even angry.

___________________________?

One of the best ways to stay at a healthy weight is to be active. You can join a sports team. Or, if you don't like team sports, try swimming, tennis, martial arts, or just being active in your own backyard. Jumping rope, dancing, and running around will get your heart pumping.

Getting some extra exercise can be as easy as taking the stairs instead of the elevator or walking instead of having your parents drive you. Being active also means watching less TV and playing fewer video games.

___________ is another part of staying fit. Aim to eat a variety of foods and get five servings of fruits and vegetables a day. Choose water and low-fat milk over soda and other sugary drinks. When it comes to high-calorie and high-fat foods, eat them only once in a while and, when you do, have smaller portions.

What Should You Do?

Talking to a parent is the best first step if you are concerned about your weight. Your mom or dad can make a doctor's appointment for you. The doctor may suggest ways of changing your eating and exercise habits.

In general, kids don't need to diet. But a kid who is very overweight may need some expert help from a dietitian or a doctor who specializes in weight management. Together, along with your family, you'll be able to come up with a safe and healthy plan that should include eating nutritious foods and exercising regularly.

小题1:What is the best title of the second part?  (No more than 8 words)

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小题2:List three physical hurt that overweight can bring to a person. (No more than 12 words.)

① _____________  ②_____________  ③___________

小题3:Fill in the blank in Paragraph 4 with proper words.  (No more than 3 words.)

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小题4:In order to keep fit, what should you pay attention to you diet?  (No more than 20 words.)

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小题5:If a kid do need lose weight, what should he do? (No more than 18 words.)

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单项选择题