外部施工劳务作业队劳务承包纠纷发生的原因主要是劳动关系和工伤事故。
参考答案：错
解析：内部施工劳务作业队劳务承包纠纷发生的原因主要是劳动关系和工伤事故。
--- Did you know __________?
--- He was ill in hospital.
A．why he doesn’t come to school
B．why he didn’t come to school
C．why does he come to school
D．why did he come to school
哭闹活动多的儿童比安静者所需的热量多2～3倍。
