下列各项中，属于等步距异节奏流水施工的特点的是（）。
A．相邻施工过程的流水步距相等，且等于流水节拍的最大公约数
B．同一施工过程在各个施工段上的流水节拍不等
C．施工过程数大于专业工作队数
D．施工段之间允许存在空闲时间
参考答案：A
解析：
等步距异节奏流水施工也称为成倍节拍流水施工。
特点如下：
(1)同一施工过程在其各个施工段上的流水节拍均相等；不同施工过程的流水节拍不等，但其值为倍数关系。
(2)相邻施工过程的流水步距相等，且等于流水节拍的最大公约数(K)。
(3)专业工作队数大于施工过程数，即有的施工过程只成立一个专业工作队，而对于流水节拍大的施工过程，可按其倍数增加相应专业工作队数目。
(4)各个专业工作队在施工段上能够连续作业，施工段之间没有空闲时间。
Many parents want their children to be famous(著名的) one day. But do children have the same ？ A new , Hi, Ke’ai, is on at Beijing Children’'s Art Theatre(剧院). It tells the story of a boy called Ke’ai. His parents would like him to become a painter(画家) or a one day. So they teach him to and to play the violin, but Ke’ai doesn't enjoy these activities. Then one day Ke’ai’s parents see Mo Yan won an award (奖)for his works, and they want him to be a writer, too “ do they want me to be someone else?” Ke'ai asks and says, “I want to be myself.” The play(话剧) shows us that it is for parents to learn to understand their children. It helps parents to what kids really want to be in the future. Young audiences（观众）enjoy the story, and also the in the play(话剧). There are two songs in the play. One of them, Ke’ai’s Song, is very easy to learn, so the audiences can sing the song on their way home the play!
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