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【单选题】
下列对数据链路层的功能特性描述中，不是正确的是（）。
A.
通过交换与路由，找到数据通过网络的最有效的路径
B.
数据链路层的主要任务是提供一种可靠的通过物理介质传输数据的方法
C.
将数据分解成帧，并按顺序传输帧，并处理接收端发回的确认帧
D.
以太网的数据链路层分为LLC和MAC子层，并在MAC子层使用CSMA/CD的协议用信道
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参考答案：
举一反三
【单选题】-What’s seven and two? -________. [     ]
A.
It’s five
B.
It’s six
C.
It’s nine
D.
It’s zero
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【简答题】Perry lives on avocados and beans. The price of avocados is $10, the price of beans is $5, and his income is $40. Show Perry’s budget line on a graph with avocados on the horizontal axis and beans on ...
查看完整题目与答案
【单选题】The slope of the production function with capital per worker on the horizontal axis and output per worker on the vertical axis
A.
is positive and gets steeper as capital per worker rises.
B.
is positive and gets flatter as capital per worker rises.
C.
is negative and gets steeper as capital per worker rises.
D.
is negative and gets flatter as capital per worker rises.
查看完整题目与答案
【单选题】—What’s the date today? —____. [     ]
A.
It’s Sunday
B.
It’s sunny
C.
It’s June 20
D.
It’s going to rain
查看完整题目与答案
【单选题】In the production function graph, with output per worker on the vertical axis and capital per worker on the horizontal axis, the slope is
A.
positive and gets steeper as capital increases.
B.
positive and gets flatter as capital      increases
C.
positive and has constant slope
D.
Is a horizontal line above the axis.
查看完整题目与答案
【单选题】If the price of bread is zero, a budget line between bread (on the vertical axis) and cheese (on the horizontal axis) would ( )
A.
be vertical.
B.
coincide with the vertical axis.
C.
coincide with the horizontal axis.
D.
be horizontal.
查看完整题目与答案
【单选题】Considering a PPF with health care services on the vertical axis and other goods and services on the horizontal axis, the increasing production of health care services in the United States as a result...
A.
a movement upward along the PPF.
B.
an outward shift of the PPF from the vertical axis.
C.
an outward shift of the PPF from the horizontal axis.
D.
a movement downward along the PPF.
查看完整题目与答案
【单选题】—This is ______ eraser. —______ her eraser.
A.
a; It’s           
B.
an; Its      
C.
an; It’s
查看完整题目与答案
【单选题】What’s the weather like today?
A.
It’s Sunday.
B.
It’s Sunny.
C.
It’s July 31 st .
D.
It’s exciting.
查看完整题目与答案
【单选题】With consumption on the vertical axis and leisure on the horizontal axis, the slope of the budget line is equal to
A.
w .
B.
-w .
C.
π .
D.
-π .
查看完整题目与答案
相关题目：
【单选题】-What’s seven and two? -________. [     ]
A.
It’s five
B.
It’s six
C.
It’s nine
D.
It’s zero
查看完整题目与答案
【简答题】Perry lives on avocados and beans. The price of avocados is $10, the price of beans is $5, and his income is $40. Show Perry’s budget line on a graph with avocados on the horizontal axis and beans on ...
查看完整题目与答案
【单选题】The slope of the production function with capital per worker on the horizontal axis and output per worker on the vertical axis
A.
is positive and gets steeper as capital per worker rises.
B.
is positive and gets flatter as capital per worker rises.
C.
is negative and gets steeper as capital per worker rises.
D.
is negative and gets flatter as capital per worker rises.
查看完整题目与答案
【单选题】—What’s the date today? —____. [     ]
A.
It’s Sunday
B.
It’s sunny
C.
It’s June 20
D.
It’s going to rain
查看完整题目与答案
【单选题】In the production function graph, with output per worker on the vertical axis and capital per worker on the horizontal axis, the slope is
A.
positive and gets steeper as capital increases.
B.
positive and gets flatter as capital      increases
C.
positive and has constant slope
D.
Is a horizontal line above the axis.
查看完整题目与答案
【单选题】If the price of bread is zero, a budget line between bread (on the vertical axis) and cheese (on the horizontal axis) would ( )
A.
be vertical.
B.
coincide with the vertical axis.
C.
coincide with the horizontal axis.
D.
be horizontal.
查看完整题目与答案
【单选题】Considering a PPF with health care services on the vertical axis and other goods and services on the horizontal axis, the increasing production of health care services in the United States as a result...
A.
a movement upward along the PPF.
B.
an outward shift of the PPF from the vertical axis.
C.
an outward shift of the PPF from the horizontal axis.
D.
a movement downward along the PPF.
查看完整题目与答案
【单选题】—This is ______ eraser. —______ her eraser.
A.
a; It’s           
B.
an; Its      
C.
an; It’s
查看完整题目与答案
【单选题】What’s the weather like today?
A.
It’s Sunday.
B.
It’s Sunny.
C.
It’s July 31 st .
D.
It’s exciting.
查看完整题目与答案
【单选题】With consumption on the vertical axis and leisure on the horizontal axis, the slope of the budget line is equal to
A.
w .
B.
-w .
C.
π .
D.
-π .
查看完整题目与答案
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