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【单选题】
胸锁乳突肌的作用A.
一侧肌收缩使头向同侧倾斜，脸转向同侧
B.
一侧肌收缩使头向对侧倾斜，脑转向对侧
C.
一侧肌收缩使头向同侧倾斜，脸转向对侧
D.
一侧肌收缩使头向对侧倾斜，脑转向同侧
E.
两侧收缩可使头前倾
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【单选题】Valve cages are used on some large diesel engines to （）
A.
reduce wear on the valve stem
B.
permit the use of alloy valve seat materials
C.
reduce heat transfer from the valve seat
D.
facilitate valve removal for servicing
【单选题】The dentist's confident manner ______ me that I was in safe hands.
A.
assured
B.
ensured
C.
insured
D.
sured
【单选题】Valve cages are used on some large diesed engines to_
A.
reduce wear on the valve stem
B.
permit the transfer of alloy valve seat materials
C.
redue heat transfer from the valve seat
D.
facilitate valve removal for servicing
【简答题】A dentist’s office may not be everyone’s idea of a perfect holiday destination.But a growing number of Europeans are travelling abroad for medical treatment to save money，or maybe to combine a visit t...
【简答题】A．At the dentist's. B．At a grocery. C．At a lawyer's. D．At a psychiatrist's.
【单选题】The woman suggests using a dentist's appointment as an excuse. Why is this not possible?
A.
The man has no teeth.
B.
The invitation is from the man's dentist.
C.
His dentist died a long time ago.
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