单项选择题
以下不属于数据处理阶段的是（ ）。
A、数据清洗
B、数据变换
C、数据绘图
D、数据合并
以下不属于数据处理阶段的是（ ）。
A、数据清洗
B、数据变换
C、数据绘图
D、数据合并
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单项选择题
Perils of the sea, such as vessel being stranded or grounded covered in an insurance policy are one kind of ( ).
Perils of the sea, such as vessel being stranded or grounded covered in an insurance policy are one kind of ( ).
A．natural calamities
B．fortuitous accidents
C．general extraneous risks
D．special extraneous risks