A.When there is no vehicle in front, you can drive at appropriate speed.

B.Never speeding, you need to speed limit according to roads, conditions and other factors.

C.Limousine, excellent performance, can speeding

A.FTTH

B.FTTC

C.FTTD

D.FTTB

A.PON technology data downlink uses broadcast

B.PON technology downlink adopted wavelength is 1310nm.

C.PON technology uplink adopted wavelength is 1490nm

D.PON technology data uplink uses broadcast

A.2219mm

B.100mm

C.1000mm

D.2500mm

A.True

B.False