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【单选题】
根据下面的文字资料回答 50～54 题 IEEE802.5令牌环网中，（ 1 ）决定。要保证环网的正常运行，环的必须有一个最低限度，即（ 2 ）。如果达不到这个要求，可以采用的一种办法是通过增加电缆长度，人为地增加来解决。 设有某一个令牌环网长度为400 m，环上有28个站点，其数据传输率为4 Mb/s，环上信号的传播速度为200 m/μs，每个站点具有1 bit，则环上可能存在的最小和最大分别是（ 3 ）bit和（ 4 ）bit。当始终有一半站点打开工作时，要保证环网的正常运行，至少还要将电缆的长度增加（ 5 ）m。 第50题：文中（ 1 ）处正确的答案是（ ）。
A.
站点和信号传播
B.
令牌帧长短和数据帧长短
C.
电缆长度和站点个数
D.
数据传输率和信号传播速度
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【简答题】The hottest place in the world is the Sahara Desert in Africa. But there are deserts in many other places: in America, in Asia and in Australia. In 1917 the temperature in Death Valley, in the United ...
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【简答题】Dialogue Two 3. Which is not right according to the conversation?A. Chinese attach great importance to the New Year. B. All the family members will come back home and have a reunion dinner. C. Every f...
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【单选题】The topic of fat is ______ many other taboo subjects.
A.
the same as
B.
different from
C.
more popular than
D.
less often talked about than
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【单选题】在采用冷端补偿电桥的热电偶检测温度的传感器中,其正确的说法是______。I热电偶是由两根电子密度不同的金属焊接而成的;II.冷端温度不变,热电偶产生的热电势与热端温度成线性关系;III.热电偶与冷端补偿电桥电路并联;IV.冷端补偿电桥中有三个桥臂是用铜丝绕制的电阻,另一桥臂是用锰铜丝绕制的电阻;V.冷端补偿电桥中,有 三个桥臂用锰铜丝绕制的电阻,另一桥臂用铜丝绕制的电阻;VI.热端温度不变、冷端...
A.
I+Ⅱ+V+Ⅵ
B.
I~Ⅳ
C.
Ⅱ~V
D.
Ⅲ~Ⅵ
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【判断题】网络广告地区不属于网络广告策划的主要内容。
A.
正确
B.
错误
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【多选题】Which TWO of the following statements are correct?
A.
The sensitivity of a project variable can be calculated by dividing the project net present value by the present value of the cash flows relating to that project variable
B.
The expected net present value is the value expected to occur if an investment project with several possible outcomes is undertaken once
C.
The discounted payback period is the time taken for the cumulative net present value to change from negative to positive
D.
Project duration only considers the cash flows before recovering approximately half of the value of the investment
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【单选题】Throughout human history there have been many stringent taboos concerning watching other people eat or eating in the presence of others. There have been attempts to explain these taboos in terms of in...
A.
always had a plentiful supply of food
B.
emphasized the need to share worldly goods
C.
emphasized the value of privacy
D.
discouraged overindulgence
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【判断题】圬工桥隧建筑物现在常用的是冷防水层。
A.
正确
B.
错误
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【单选题】仔猪保育舍舍内温度在
A.
26~30 ℃
B.
20~30 ℃
C.
15~20 ℃
D.
25~30 ℃
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【单选题】— 'Cars and buses burn oil.' — ' ______. '
A.
So do many other machines
B.
Many other machines do so
C.
So many other machines do
D.
Many other machines so do
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相关题目：
【简答题】The hottest place in the world is the Sahara Desert in Africa. But there are deserts in many other places: in America, in Asia and in Australia. In 1917 the temperature in Death Valley, in the United ...
查看完整题目与答案
【简答题】Dialogue Two 3. Which is not right according to the conversation?A. Chinese attach great importance to the New Year. B. All the family members will come back home and have a reunion dinner. C. Every f...
查看完整题目与答案
【单选题】The topic of fat is ______ many other taboo subjects.
A.
the same as
B.
different from
C.
more popular than
D.
less often talked about than
查看完整题目与答案
【单选题】在采用冷端补偿电桥的热电偶检测温度的传感器中,其正确的说法是______。I热电偶是由两根电子密度不同的金属焊接而成的;II.冷端温度不变,热电偶产生的热电势与热端温度成线性关系;III.热电偶与冷端补偿电桥电路并联;IV.冷端补偿电桥中有三个桥臂是用铜丝绕制的电阻,另一桥臂是用锰铜丝绕制的电阻;V.冷端补偿电桥中,有 三个桥臂用锰铜丝绕制的电阻,另一桥臂用铜丝绕制的电阻;VI.热端温度不变、冷端...
A.
I+Ⅱ+V+Ⅵ
B.
I~Ⅳ
C.
Ⅱ~V
D.
Ⅲ~Ⅵ
查看完整题目与答案
【判断题】网络广告地区不属于网络广告策划的主要内容。
A.
正确
B.
错误
查看完整题目与答案
【多选题】Which TWO of the following statements are correct?
A.
The sensitivity of a project variable can be calculated by dividing the project net present value by the present value of the cash flows relating to that project variable
B.
The expected net present value is the value expected to occur if an investment project with several possible outcomes is undertaken once
C.
The discounted payback period is the time taken for the cumulative net present value to change from negative to positive
D.
Project duration only considers the cash flows before recovering approximately half of the value of the investment
查看完整题目与答案
【单选题】Throughout human history there have been many stringent taboos concerning watching other people eat or eating in the presence of others. There have been attempts to explain these taboos in terms of in...
A.
always had a plentiful supply of food
B.
emphasized the need to share worldly goods
C.
emphasized the value of privacy
D.
discouraged overindulgence
查看完整题目与答案
【判断题】圬工桥隧建筑物现在常用的是冷防水层。
A.
正确
B.
错误
查看完整题目与答案
【单选题】仔猪保育舍舍内温度在
A.
26~30 ℃
B.
20~30 ℃
C.
15~20 ℃
D.
25~30 ℃
查看完整题目与答案
【单选题】— 'Cars and buses burn oil.' — ' ______. '
A.
So do many other machines
B.
Many other machines do so
C.
So many other machines do
D.
Many other machines so do
查看完整题目与答案
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