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【单选题】
设随机变量 X 的分布律为 P { X = k }= A /( k 2 + k ) , ( k =1 , 2 , 3 , 4) ,其中 A 为常数,则 P {0.5< X <2.5}=( )A.
2/3
B.
3/4
C.
4/5
D.
5/6
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皮皮学刷刷变学霸
举一反三
【单选题】Both bus and tree topologies are characterized by the use of multipoint (1).For the bus, all stations attach, through appropriate hardware (2) known as a tap, directly to a linear transmission medium,...
A.
tree
B.
bus
C.
star
D.
ring
【单选题】Both bus and tree topologies are characterized by the use of multipoint (1).For the bus, all stations attach, through appropriate hardware (2) known as a tap, directly to a linear transmission medium,...
A.
routers
B.
stations
C.
servers
D.
switches
【简答题】The bus is full and we can't ( ) any more passengers in.
【单选题】The bus is full and we can’t ________ any more passengers in.
A.
contribute
B.
original
C.
cram
D.
intake
E.
underestimate
【单选题】The bus is full and we can’t ________ any more passengers in.
A.
cram
B.
grab
C.
contribute
D.
worsen
【单选题】Both bus and tree topologies are characterized by the use of multipoint (1).For the bus, all stations attach, through appropriate hardware (2) known as a tap, directly to a linear transmission medium,...
A.
medium
B.
connection
C.
token
D.
resource
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