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【单选题】
当严重贫血时，可用A.
红细胞输注
B.
血小板输注
C.
血浆置换输注
D.
白蛋白输注
E.
浓缩粒细胞输注
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】You are too stressed out. Why not _____ some light music? [ ]
A.
listen to
B.
listening to
C.
listen
D.
hear
【单选题】When you are not sure if a lady is married or single, you shall call her_______
A.
Madam
B.
Ms.
C.
Miss
D.
Mrs.
【单选题】In a Teleworker deployment with a single IP phone connected to a Cisco 831 router, select the true statement regarding Call Admission Control.（）
A.
RSVP is a required configuration to support conference calls without voice packet loss.
B.
The QoS configuration on the 831 router must always provision sufficient bandwidth for two RTP streams.
C.
Call admission control is an issue only when using hardware DSP resources.
D.
When using the conference call features on a 7960 IP phone, only one RTP stream is present regardless of how many extensions are on the conference.
【单选题】Listen! There must be some children ________ songs in our neighborhood. [ ]
A.
singing
B.
to sing
C.
sing
D.
sings
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