问题 单项选择题

下列属于C类p地址的是______。

A.202.115.32.24

B.126.0.65.6

C.189.25.10.1

D.10.0.0.2

答案

参考答案:A

解析:C类地址主要分配给小型网络,如一般的局域网和校园网,它可连接的主机数量是最少的,采用把所属的用户分为若干网段进行管理。其表示范围为192.0.0.0~ 223.255.255.255,默认网络的掩码为255.255.255.0。

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_____小题1:Susan is a big eater. She usually has a lot at every meal. So she wonders whether she could only eat less for the first meal of a day to lose weight.

_____小题2:Tina is a fat girl who doesn’t like exercise much. She just wants to lose weight by eating less but not doing exercise.

_____小题3:Maggie is a busy office lady. She usually has to work overtime every day. So she could only have her dinner late at night. She wants to be slimmer so that she could be much more attractive.

_____小题4: Judy is a fashionable designer. She hopes to have a slim shape as models. She usually doesn’t have any regular meal, but has some snacks when she is hungry.

A.If you eat less for breakfast, you have a lower chance of losing weight. Breakfast is important. It gives the body sufficient energy to sustain itself through the morning, and it also stimulates metabolic (新陈代谢) activity in the body. Metabolism is what consumes fat and what makes us slimmer. So, don’t forget to eat something for the breakfast.

B.If you ate your last meal right before going to bed, the calories accumulated from this meal could be twice the amount accumulated from a same meal if you ate it another time during the day.

C.Many people stop doing exercise when they eat less. When you do this, your body will burn less fat. So even if people take in less calories, they get rid of less too. The balance is then unchanged.

D.People gain fat not from the food they eat, but from the number of calories in the food. For example, a bunch of vegetables has just one tenth the calories contained in a small bit of chocolate cake. So make sure you have adequate regular meals, but firmly say no to various snacks, milk tea or even instant noodles.