公司尚未向InterNIC申请永久网络ID,这样,您可以使用保留给专有内部网的B网络

题型:单项选择题

问题:

公司尚未向InterNIC申请永久网络ID,这样,您可以使用保留给专有内部网的B网络ID172.16.0.0要求您根据这个IP编址方案计算子网掩码考虑到将会有近50个子网,而每个子网必须能够容纳超过800台主机,这样,您将使用下列哪一个子网掩码()

A.255.255.240.0

B.255.255.248.0

C.255.255.252.0

D.255.255.254.0

考点:计算机网络管理员计算机网络管理员(高级)计算机网络管理员(高级)题库
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When you do not use your arms or your legs for some time, they will become weak. When you start using them again, they slowly become strong again. Everybody knows that. Yet many people do not seem to know that memory (记忆 )  works in the same way.

When someone says that he has a good memory, he really means that he keeps his memory in practice by using it.  When someone else says that his memory is poor, he really means that he does not give it enough chance to become strong.

If a friend says that his arms and legs are weak, we know that it is his own fault (过错).  But if he tells us that he has a poor memory, many of us think that his parents may be blamed (责备 ) , and few of us know that it is just his own fault. Have you ever found that some people can’t read or write but usually they have better memories? This is because they cannot read or write but they have to remember things, they cannot write them down in a small notebook.  They have to remember days, names, songs and stories, so their memory is being exercised the whole time.

So if you want to have a good memory, learn from the people: practice remembering things in a way as other people do.

小题1: Someone can’t have a good memory if _     

A.his parents don't have a good memory

B.he can't read or write

C.he doesn’t use his memory

D.he doesn't use his arms or legs for some time小题2: If you do not use your arms or legs for some time,                    _

A.they become weak and wont become strong until you use them again

B.they will become stronger

C.they become weak but they slowly become strong again

D.you cant use them any more小题3: Which of the following is true?

A.Your memory works in the different way as your arms or legs.

B.Your memory, like your arms or legs, becomes weak if you do not give it enough chance

to practice.

C. Don't learn how to read or write if you want to have a better memory.

D.A good memory comes from less practice.小题4: Few people know that it is only _     if a friend has a poor memory.

A.his grandmother's fault

B.his parents fault

C.his teachers’ fault

D.his own fault小题5: The writer wants to tell us________ .

A.how to have a good memory

B.how to read and write

C.how to use our arms or legs

D.how to learn from the people

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板带材平直度或板形是可测量参数。

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某患者的脾脏超声表现如图,可诊断为()

A.正常脾脏

B.脾大

C.脾囊肿

D.脾梗死

E.脾包膜下血肿

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检验检疫合格的入境货物签发( ),不合格的签发检验检疫处理通知单,需要索赔的签发检验检疫证书。

A.《入境货物检验检疫证明》
B.《入境货物通关单》
C.《进口货物证明》
D.《进口商品安全质量许可证》

题型:单项选择题

对于现代社会的人,尤其是对于亟待成功的大学生来说,心理健康的意义远远超过身体健康。

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