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【单选题】
电流的方向是客观存在的,在交流电路中,电流是随时间变化的,在图上也无法表示其实际方向,为了解决这一问题,须引入( )这一概念。A.
电流的规定方向
B.
电流的参考方向
C.
电流的实际方向
D.
电流的假定方向
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【单选题】不使用捕捉工具时,骨骼能直接创建在下列哪种位置?( )
A.
透视图的 XY平面上
B.
透视图的 ZY平面上
C.
透视图的 ZX平面上
D.
透视图中经过原点的任意平面上
【简答题】What are the five layers in the Internet protocol stack? What are the principal responsibilities of each of these layers?
【单选题】It is proved that the Sun is divided into five layers.
A.
Right
B.
Wrong
C.
Not mentioned
【简答题】Where do these people live? Watch the interviews and match the names with the information. Video Track 1-6-1.wmv a. lives in a small house with four bedrooms. b. lives in a house in Mexico City. c. li...
【判断题】The five layers of the OSI reference model can be divided into two categories: upper layers and lower layers.
A.
正确
B.
错误
【单选题】Why does Jonathan like green?
A.
He lives in Washington State, it often rains there. So everything is green, the trees are green, the plants are green.
B.
No reason.
【多选题】What are five of the seven layers that are found in the OSI model?（）
A.
application
B.
protocol
C.
session
D.
transport
E.
physical
F.
gateway
G.
data link
【单选题】Jonathan lives in ____.
A.
a small house with four bedrooms.
B.
a house in Mexico city
C.
a house with three different rooms and a kitchen
D.
a place with six rooms
【简答题】What are the five layers in the Internet protocol stack?
【简答题】Five layers of a linguistic structure are_______,_______,_______,_______, and sentence.
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