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【单选题】
隙卡沟底不能预备楔形，且不能破坏相邻牙的接触点的目的是（）A.
少磨牙
B.
有利于隙卡弯制
C.
防止食物嵌塞
D.
方便义齿摘戴
E.
避免对基牙产生楔力
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举一反三
【单选题】The scientists wanted to keep people ______ about the breakthrough in their experiment.
A.
inform
B.
informed
C.
informing
D.
to inform
【单选题】According to the Bible story , people wanted to build a city because ( ).
A.
they found that the people lived in the land of Shinar were friendly
B.
they were tired of a wandering life
C.
they wanted to be well-known
D.
they have no place to live
【单选题】Hippies gave flowers to people because they______.
A.
wanted a world based on love of humanity and peace
B.
could not find jobs and had to sell flowers for a living
C.
wanted to tell people that they were badly in need of love
D.
wanted to show people that they meant no harm to them
【简答题】What did the government do with the funding for the people who wanted to retrain?
【简答题】出门戴口罩
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