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【单选题】
In OSI, which layer provides reliable end-to-end communication service?
A.
network layer
B.
transport layer
C.
application layer
D.
data link layer
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举一反三
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A.
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B.
错误
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【单选题】Some restaurants only accept _______ so make sure that you have enough with you.
A.
a credit card
B.
money
C.
a cheque
D.
cash
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