RRU电源线屏蔽层接地,若电缆长度超过()米,需在电缆中间部分加做一处防雷接地。
A.80
B.70
C.60
D.50
参考答案:B
My Family Tree
My name is Bill. I’m from England. I am a worker. My wife(妻子), Ann, is a teacher. We have two kids. A son and a daughter. Jim is our son. Sally is our daughter. They are students. My father’s name is Robby. My mother’s name is Diana. They are old. I have a brother. His name is Robert. He is a worker, too. My wife’s father is Sam. Her mother’s name is Rose. Her sister is Lily. She is a teacher, too.
围生期(围产期)国内采用的定义是指()
A.胎龄满27周至出生后7足天
B.胎龄满27周至出生后15足天
C.胎龄满28周至出生后7足天
D.胎龄满28周至出生后15足天
E.胎龄满29周至出生后15足天