发证部门不能组织无证特种设备作业人员培训。（）
参考答案：错
When he was young， he used to hard at his lessons.
A．devote to working
B．devote himself to work
C．be devoted to work
D．be devoted to working
单桩水平承载力与哪些因素有关？设计时如何确定？
