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【单选题】
关于危机传播模型，焦点事件理论的代表人物是（ ）A.
斯蒂文·芬克
B.
威廉·班尼特
C.
托马斯·伯克兰
D.
格鲁尼格
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【多选题】某点的高度是海拔682m,其含义是( )。
A.
该点的绝对高程为682m
B.
该点的相对高程为682m
C.
该点至假定水准面的铅垂距离为682m
D.
该点至大地水准面的铅垂距离为682m
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