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【简答题】
简述分隔与划分的手段
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该牙的形态、大小、位置基本类似
B.
其标准形态一般与第一磨牙相同
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A.
Because only a few African-American actors are nominated.
B.
Because only a few white actors are nominated.
C.
Because all the acting nominees are African-Americans.
D.
Because all the acting nominees are white.
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A.
启动阶段
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成长阶段
C.
成熟阶段
D.
衰退阶段
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