一个运行CSMA/CD协议的以太网,数据速率为1Gb/s,网段长1km,信号速率为2

题型:单项选择题

问题:

一个运行CSMA/CD协议的以太网,数据速率为1Gb/s,网段长1km,信号速率为200,000km/sec,则最小帧长是()比特。

A、1000

B、2000

C、10000

D、200000

考点:网络管理员考试网络管理员考试题库
题型:单项选择题

水龙带是井下作业中进行循环施工的重要配件,其一端与()的鹅颈管或活动弯头相连,另一端与立管或地面管线相连.

题型:单项选择题

阅读下面短文,从短文后各题所给的四个选项(A、B、C 和 D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

                                    A Heroic Driver

Larry works with Transport Drivers. Inc. One morning in 2009. Larry was  41

along 165 north after delivering to one of his    42   . suddenly, he saw a car with its bright lights on.    43    he got closer, he found 44    vehicle upside down on the road. One more look and he noticed    45    shooting out from under the    46    vehicle. Larry pulled over, set the brake and    47   the fire extinguisher (灭火器). Two good bursts from the extinguisher and the fire was put out.

The man who had his bright lights on    48    and told Larry he had    49    an emergency call. They    50    heard a woman’s voice coming from the wrecked (毁坏的) vehicle.    51   the vehicle, they saw that a woman was trying to get out of the broken window. They told her to stay    52    until the emergency personnel arrived,    53    she thought the car was going to    54   . Larry told her that he had already put out the fire and she should not move    55    she injured her neck.

Once fire and emergency people arrive, Larry and the other man    56    and let them go to work. Then, Larry asked the    57    if he was needed or    58    to go. They let him and the other man go.

One thing is    59   —Larry went above and beyond the call of duty by getting so close to the burning vehicle! His    60    most likely saved the woman’s life.

49()

A.returned

B.received

C.made

D.confirmed

题型:单项选择题

现在藏于台北故宫博物院的北宋时期的山水画《早春图》的作者是()

A.郭熙

B.张择端

C.王

D.范宽

题型:单项选择题

Lui et moi _____ à votre santé.

A.boit

B.buvons

C.bois

D.boivent

题型:单项选择题

《个贷办法》明确规定,个人贷款用途应符合()贷款人不得发放无指定用途的个人贷款。

A.法律

B.法规

C.国家有关政策

D.经营需求

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