单项选择题

考虑到对称性，井字棋最终局面有____种不相同的可能

A．44
B．91
C．138
D．19683

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单项选择题

When purchase costs of inventory regularly decline, which method of inventory costing will yield the lowest cost of goods sold?
A、FIFO.
B、LIFO.
C、Weighted average.
D、Specific identification.
E、Gross margin.

单项选择题