TCP/IP (1) layer protocols provide service

题型:单项选择题

问题:

TCP/IP (1) layer protocols provide services to the application(2) running on a computer. The application layer does not define the application itself, but rather it defines  (3) that applications need-like the ability to transfer a file in the case of HTTP. In short, the application layer provides an (4) between software running on a computer and the network itself. The TCP/IP application layer includes a relatively large number of protocols, with HTTP being only one of those. The TCP/IP  (5) layer consists of two main protocol options-the Transmission Control Protocol (TCP) And the User Datagram Protocol (UDP).

空白(1)处应选择()

A.application

B.transport

C.link

D.network

考点:计算机软件水平考试初级网络管理员初级网络管理员模拟试卷一(上午)
题型:单项选择题

某大面积烧伤病人基础代谢量约1500kcal,其伤后每日能量需要量约为()

A.2000kcal

B.2500kcal

C.3000kcal

D.3500kcal

E.4000kcal

题型:单项选择题

下列选项不是商业银行用来计算VaR值的模型技术的是()。

A.期望法

B.方差一协方差法

C.历史模拟法

D.蒙特卡洛模拟法

题型:单项选择题

阅读理解。

     Sitting on the peaceful coast of Galapagos Islands. Ecuador, watching the sun move quietly into the sea,

you shouldn't forget that Charles Darwin (1809-1882) arrived here in 1835. He stayed on the islands for five

weeks, observing various animals. This finally inspired (启发) his famous work, On the Origin of Species.

You can certainly follow Darwin's footsteps and enjoy a trip from four to seven days to the islands.

     The islands are certainly a paradise (天堂) for wildlife, as there are no natural killers on the islands and the

number of boats and visitors is under government control. Though you cannot walk freely as Darwin did about

200 years ago, each day is as impressive as it could be.

     The most well-known animal of the Galapagos is the giant tortoise (巨型海龟), which can be seen moving

slowly around the highlands of Sanra Cruz, the second largest island in the archipelago (群岛). Some of these

creatures are so old that they might have been seen in their youth by Darwin himself.

     Despite strict control over activities and timing, your stay on the Galapagos will be remembered as a chain

of incomparable pictures: diving with sea lions that swim and play within inches of you; feeling small sharks

touch your feet as you swim; and, most magically, seeing a whale and her baby surface with a great breath of

air.

     Travelling between the islands and observing the wildlife that so inspired Darwin, you will feel as though

you are getting a special view of an untouched world. At night you will sleep on board the ship, leaving the

wildlife in complete occupation of the islands, which are as undisturbed now as they have been since the

beginning of time.

1. What do we know about Darwin's visit to the islands? [ ]

A. He studied different creatures on the islands

B. He completed his famous book on the islands

C. He was touched by the geography of the islands

D. He was attracted by well-known animals of the islands

2. Which of the following plays a role in making the islands "a paradise for wildlife"? [ ]

A. Animals on the islands feed on grass.

B. Local government forbids killing wildlife.

C. People cannot visit the islands as they wish.

D. Tourists are not allowed to touch the animals.

3. Your stay on the islands will be most impressive mainly because of _____.

A. The beautiful sea views

B. Darwin's inspiring trip

C. a closer view of animals

D. various daring activities

4. Which of the following would be the best title for the passage?[ ]

A. A Unique Attraction for Wildlife Lovers

B. Calapagos as a Paradise for Adventures

C. Charles Darwin as a Symbol of Galapagos

D. A successful Example of Wildlife Protection

题型:单项选择题

3/4冠预备邻轴沟的主要目的是()。

A.增加摩擦力

B.防止舌向脱位

C.防止唇向脱位

D.防止龈向脱位

题型:单项选择题

新型钢筋气压对焊机适用于工业与民用建筑物、构筑物的钢筋混凝土结构中()mm的Ⅰ级、Ⅱ级、Ⅲ级以及部分进口钢筋,在垂直、水平和倾斜位置钢筋接头的对接焊接。

A.φ10~30

B.φ12~40

C.φ10~40

D.φ20~40

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