靠近架空电线作业,要保证留开安全距离,一般照明线(),动力线(),否则要采取防护措施才准靠近。()
A.1米,1米
B.2米,1米
C.1米,2米
D.2米,2米
参考答案:C
Discourse theory of second language acquisition was developed from the______.
A.habit formation theory
B.Hallidays theory of first language acquisition
C.monitor theory
D.Cognitive theory
同步检疫是指与屠宰操作相对应,对同一头猪的()胴体等统一编号进行检疫。
A、头
B、蹄
C、内脏
D、肝脏