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【单选题】
best effort 业务可用PIR和CIR描述如下（）。A.
CIR>0
B.
PIR=CIR>0
C.
PIR>CIR>0
D.
PIR>0，CIR=0
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举一反三
【简答题】句型转换 1. Don't worry. I can repair it on my own. Don't worry. I can repair it 2. Mr. Wang got up early so that he might not miss the early bus. Mr. Wang got up early _____ _____ _____ _____ miss the ea...
【简答题】I don’t suppose you need to worry.英译汉
【单选题】—Don't go on a voyage alone. —Don't worry. .
A.
I won ' t
B.
I don ' t
C.
I can ' t
D.
I haven ' t
【单选题】—Don't step on the grass next time, Mike. —________. [ ]
A.
Is that so?
B.
Don't worry.
C.
I don't know.
D.
Sorry, I won't.
【单选题】—My cousin bought me aft English learning machine, but I don't know ________. —Don't worry. Just follow the instruction. [ ]
A.
how to use it
B.
which one to choose
C.
when to use it
【简答题】Don‘t worry. Your child is well looking after here.
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