单项选择题
( )是自描述的，数据的结构和内容混在一起，没有明显的区分。
A 结构化数据
B 半结构化数据
C 非结构化数据
D 流式数据
( )是自描述的，数据的结构和内容混在一起，没有明显的区分。
A 结构化数据
B 半结构化数据
C 非结构化数据
D 流式数据
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单项选择题
Refer to Table 2.1. To maximize total production,
Refer to Table 2.1. To maximize total production,
A．Krystal should specialize in writing TV commercials, and Mark should specialize in writing poems.
B．Mark should specialize in writing TV commercials, and Krystal should specialize in writing poems.
C．Krystal should write poems and write TV commercials, but Mark should only write poems.
D．Krystal and Mark should both split their time between writing poems and writing TV commercials.