单选题 In how many arrangements can a teacher seat 3 girls and 3 boys in a row of 6 seats if the boys are to have the first, third, and fifth seats?

【正确答案】 D
【答案解析】[解析] 若3男孩在1,3,5时,则3个女孩应在2,4,6,所以总的安排方式为:
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