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[主观题]

Outline what clock configurations can ensure stable running of services when PTN-A and

PTN-B are configured with E1 services. You can describe them in two situations respectively: whole network clock sync and clock async.

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发布时间：2022-05-17

更多“Outline what clock configurations can ensure stable running of services when PTN-A and”相关的问题

第1题

What’s wrong ____________your clock？

A.with

B.about

C.for

D.to

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第2题

The fiddler crab is a living clock.It indicates the time of day by the color of its sk

m, which is dark by day and pale by night.The crab's changing color follows a regular twenty-four hour plan that exactly matches the daily rhythm of the sun.

Does the crab actually keep time, or does its skin simply answer to the sun's rays, changing color according to the amount of light that strikes it？ To find the reason out, biologists kept crabs fo a dark room for two months.Even without daylight the crab's skin color continued to change exactly on time.

This characteristic probably developed gradually in answer to the daily rising and setting of the sun, to help protect the crab from sunlight and enemies.After millions of years it has become completely regulated inside the living body of the crab.

The biologists noticed that once each day the color of the fiddler crab is especially dark, and that each day this happens fifty minutes later than on the day before.From this they discovered that each crab follows not only the rhythm of the sun but also that of the tides.The crab's period of greatest darkening is exactly the time of low tide on the beach where it was caught!

21.The fiddler crab is like a clock because it changes color ().

A.in a regular 24-hour rhythm

B.in answer to the sun's rays

C.at low tide

D.every fifty minutes

22.The crab's changing color ().

A.tells the crab what time it is

B.protects the crab from the sunlight and enemies

C.keeps the crab warm

D.is of no real use

23.When the fiddler crabs were kept in the dark, they ().

A.did not change color

B.changed color more quickly

C.changed color more slowly

D.changed color on the same timetable

24.The crab's color-changing ability was probably developed ().

A.in the process of evolution

B.over millions of years

C.by the work of biologists

D.both A and B

25.The best title for this selection would be ().

A.The Sun and the Tides

B.Discoveries in Biology

C.A Scientific Study

D.A Living Clock

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第3题

The method I shall summarize below is the one I have found most successful.（)

A.outline

B.describe

C.elaborate

D.expound

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第4题

Which of the following are entity types defined in 1588V2 （PTP) protocol？（)

A. ordinary clock

B.border clock

C.transparent transmission clock

D.transparent transmission clock

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第5题

Among ZXCTN products, clocks at CES service receiving end work in（)mode by default.

A.nAuto

B.nservice recovery timing (customer)

C.nsystem clock

D.nloopback clock

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第6题

Among ZXCTN series products, （)has only one PTP port.

A.nordinary clock

B.nboundary clock

C.nE2E transparent transmission clock

D.nP2P transparent transmission clock

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第7题

My suggestion is that we_____ together at six o'clock tomorrow.

A.go

B.would go

C.will go

D.have gone

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第8题

The （) on Page 22 shows a political map of Afric.

A.structure

B.shape

C.figure

D.outline

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第9题

It was not yet eleven o’clock when a boat crossed the river with a single passenger. W

hile the youth stood on the landing-place searching in his pockets for money, the boatman lifted a lantern. By the newly risen moon, he took a very careful look at the stranger's appearance. He was a young man of eighteen years with brown, curly hair, well-shaped features. His bright, cheerful eyes were nature's gifts, and worth all that art could have done for his adornment (装饰. And now, as it seemed, he was on his first visit to town. He was wearing a rough gray coat, which was in good shape, but which had seen many winters before this one. In his left hand was a walking stick, and a leather bag in his right hand. The bag seemed not so much stocked. The youth, whose name was Robin, paid the boatman, and then walked forward into the town with a light step, as if he had not already traveled more than thirty miles that day. As he walked, he surveyed his surroundings as eagerly as if he were entering London or Madrid, instead of the little metropolis (中心城市 ) of a New England colony

1.What time of year was it in this story？()

A、Spring

B、Summer

C、Fall

D、Winter

2.At what time of day did Robin cross the river？()

A、Morning

B、Midday

C、Late afternoon

D、Night

3.Robin was apparently going to town()

A、to buy new clothes