皮皮学，免费搜题
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【单选题】
形成牙髓的结构是A.
成釉器
B.
牙乳头
C.
牙囊
D.
牙板
E.
前庭板
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】--- How’s it going, Sarah? ---.__________ Every night I have to work late and I feel really tired
A.
Great!
B.
Pretty good.
C.
Not bad.
D.
Terrible!
【单选题】— I feel ______ a pity that I didn't attend Professor Smith's lecture. — You really should have. [ ]
A.
this
B.
it
C.
that
D.
one
【简答题】I feel I have many ___________(skill) and ____________(quality)
【单选题】In desperation, Mrs. Jones ________ an operation on her right knee to relieve the pain.
A.
subordinated to
B.
B) submitted to
C.
C) was obedient to
D.
D) submitted
【简答题】换向阀有哪几种控制方式？换向阀的位和通各表示什么意思。
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