一支600米长的队伍行军,队尾的通信员要与最前面的连长联系,他用3分钟跑步追上了连长,又在队伍休息的时间以同样的速度跑回

一支600米长的队伍行军,队尾的通信员要与最前面的连长联系,他用3分钟跑步追上了连长,又在队伍休息的时间以同样的速度跑回了队尾,用了2分24秒。如队伍和通信员均

查看答案

David's greatest problem is

David's greatest problem isA.finding a bank that will treat him as an adult. B.i

查看答案

Foreign money can be converted into the local currency at th

Foreign money can be converted into the local currency at this bank .A.written B

查看答案

1,3,8,17,36,73,(  )

1,3,8,17,36,73,(  )A.147 B.148 C.149 D.150

查看答案

11.10,12,8,16,(  ),32

11.10,12,8,16,(  ),32A.28 B.24 C.8 D.0

查看答案