皮皮学，免费搜题
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【单选题】
所谓的“临床牙冠”是指A.
暴露于口腔的牙体部分
B.
被牙龈覆盖的牙体部分
C.
发挥咀嚼功能的牙体部分
D.
被牙本质所覆盖的牙体部分
E.
被牙釉质所覆盖的牙体部分
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】牙膏中的药效成分一般有哪几类?
【单选题】—What do you think made Mary so upset? —_______ her new bike.
A.
As she lost
B.
Lost
C.
Losing
D.
Because of losing
【单选题】-What do you think made Mary so upset? -_________ her new bike. [ ]
A.
As she lost
B.
Lose
C.
Losing
D.
Because of losing
【简答题】—What do you think made Mary so
upset? —_______ her new bike.A. As she lost B. Lost C. Losing D. Because of losing
【单选题】-----What do you think made Mary so upset ? -----_______her new bike
A.
As she lost
B.
lost
C.
Because she lost
D.
Losing
【单选题】— What do you think made Mary so upset? — ____ her new bike. [ ]
A.
Lost
B.
As she lost
C.
Losing
D.
Because of losing
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