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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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反馈参考答案：
举一反三
【多选题】You go to a detective dinner party. During dinner, there’s an announcement! Listen and tick the characters in this murder story .
A.
a private detective
B.
the owner of the house
C.
the owner’s wife
D.
the cook
E.
an assistant detective
F.
a police inspector
G.
the gardener
【多选题】WOS(web of science)核心合集中含下列哪些数据库：
A.
SCI-E
B.
SSCI
C.
CPCI-S
D.
Medline
E.
Current Chemical Reactions (CCR-EXPANDED)
【多选题】A few days before the party, William and Rita look at the list of things they have to do. Listen and tick the things they’ve already done. Rita has already....
A.
order the food
B.
hire the costumes
C.
buy party decorations
D.
write the guest list
E.
clean and tidy the house
【简答题】Listen and tick the facilities you hear.Give a "X" to the facilities you don't hear.
【多选题】A few days before the party, William and Rita look at the list of things they have to do. Listen and tick the things they’ve already done. William has already .....
A.
buy drinks
B.
hire the tent
C.
invite the neighbours
D.
put the tent up in the garden
E.
get the costumes from the shop
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