七名同学战成一排照相，其中甲、乙二人相邻，且丙、丁两人不相邻的不同排法总数为_1．

题干

七名同学战成一排照相，其中甲、乙二人相邻，且丙、丁两人不相邻的不同排法总数为____．

上一题下一题 0.0难度选择题更新时间:2018-08-07 04:37:49

960

请根据所听到的内容，选择表格中的正确信息，用5—6句话进行复述。

(将复述内容写下来)。

⑴ How about studying abroad in recent years? (enjoyable/popular)
Advantages	⑵ What's the first advantage? (make more friends／experience foreign life)
	⑶ What's the second advantage? (improve their foreign languages／learn about different cultures)
Disadvantages	⑷ What's the first disadvantage? (too young to look after themselves／too young to learn)
	⑸ What's the second disadvantage?(the low cost／the high cost)

你可以这样开始：The speaker is talking about…

Answer：____