根据阻生智齿的长轴与第二磨牙长轴的关系,Winter(1926)将其分为:垂直阻生;______阻生;_____阻生;_____阻生;颊向阻生;舌向阻生;____阻生等。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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