颗粒剂的粒度检查,除另有规定外,不能通过一号筛和能通过五号筛的总和不得超过供试量的( )
A. 5%
B. 10%
C. 15%
D. 20%
E. 25%
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下列关于制颗粒的目的叙述错误的是( )
A. 增加物料的流动性
B. 避免粉末分层
C. 减少细粉吸附和容存的空气
D. 增加物料的硬度
E. 避免细粉飞扬
Which one does not belong to the group of FTTP ( )?
A. FTTN
B. FTTH
C. FTTB
D. FTTO
Which statement below is correct ( )?
A. Fiber reaches the boundary of the living space, called FTTO.
B. Fiber reaches the boundary of the building, called FTTB.
C. Fiber reaches the user´s workstation or service points, called FTTN.
D. Fiber reaches the street cabinet, called FTTH..
Why FTTC is similar with FTTN ( )?
A. Triple-play service is based on it.
B. Fiber go all the way to the shared electrical room.
C. It is far away from premises.
Data transfer from mainstream to the local loop.
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