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【单选题】
主机A向主机B 发送一个（SYN=1,seq=11220）的TCP报，期望与主机B建立TCP连接，若主机B接受该连接请求，则主机B向主机A发送的正确的TCP报可能是（ ）A.
SYN=0,ACK=0,seq=11221,ack=11221
B.
SYN=1,ACK=1,seq=11220,ack=11220
C.
SYN=1,ACK=1,seq=11221,ack=11221
D.
SYN=0,ACK=0,seq=11220,ack=11220
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【简答题】In my ( 意见,看法 ) , it is good for us to play sport.
【简答题】play sport
【单选题】The girl _____ every Sunday. [ ]
A.
play sport
B.
plays sport
C.
play sports
D.
plays sports
【简答题】It is learnt from the experiences that kids get much more than just keeping fit when they play sports. Many people think that sports will waste time, and kids will not concentrate on their studies. 小题...
【简答题】a noun that can also be used to talk about the way actors act and sportspeople play sport. ____________
【单选题】When you play sport,you need to guard________accidents.
A.
over
B.
against
C.
with
D.
at
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