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解析:
E．
The first male rolecan be filled by any of the five men，and the second byany of the remaining 4，for a total of 5 times 4=20choices．Similarly，there are 120ptions for the first female role，11 for the next，10 for the third，and 9 for the last．The total number of possibilities is thus 5 times 4 times 12 times11 times 10 times 9=237．600．
The first male rolecan be filled by any of the five men，and the second byany of the remaining 4，for a total of 5 times 4=20choices．Similarly，there are 120ptions for the first female role，11 for the next，10 for the third，and 9 for the last．The total number of possibilities is thus 5 times 4 times 12 times11 times 10 times 9=237．600．
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