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【多选题】
关于釉质发育不全的治疗原则，下列说法正确的是（ ）A.
注重对釉质发育不全的早期防龋，主要通过局部涂氟和窝沟封闭
B.
大面积釉质发育不全的磨牙应尽早治疗，涂氟降低牙髓敏感性或充填，必要时预成冠修复
C.
对于釉质着色而无实质性缺损的牙齿，可牙漂白或冷光美白或激光治疗
D.
对于着色深，牙体缺损多的釉质发育不使用树脂贴面
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【简答题】小麦条锈病的发生和流行主要取决于( )、( )以及( )。
【简答题】The author’s purpose in writing this passage is ________. A) to describe the difficulties in solving humanity’s current problems B) to present the different views on humanity’s current problems C) to ...
【简答题】Defining the meaning of 'happiness' is a perplexing proposition because it is very difficult to ______.
【单选题】The word "dysphagia" means _______________.
A.
unable to eat
B.
unable to sleep
C.
difficulty in sleeping
D.
difficulty in swallowing
【单选题】We went through a period communications were very difficu1t in the rura1 areas. （ ）
A.
which
B.
whose
C.
in which
D.
with which
【单选题】As well as being intangible, what is the problem with emotions ?
A.
They are difficult.
B.
They are compounded.
C.
They are difficult to qualify.
D.
They do not operate in isolation.
【单选题】The two rings are so alike thatit is difficult to tell one theother ．
A.
． very ； to
B.
． much ； to
C.
． much ； from
D.
． very ； from
【单选题】choice of investigation in case of detection of dismotility in esophageal dysphagia?
A.
Endoscopy
B.
Biopsy
C.
Manometry
D.
Video fluoroscope
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