题目内容
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[单选题]
FTTB，即Fiber to The Building（光纤到楼)，它是利用（)技术，光纤直接到小区里，再通过双绞线（超五类双绞线或4对非屏蔽双绞线)到各个用户。
A.软交换
B.DWDM
C.SDH
D.数字带宽
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.软交换
B.DWDM
C.SDH
D.数字带宽
如果结果不匹配，请 联系老师 获取答案
更多“FTTB，即Fiber to The Building(光纤…”相关的问题
Bonding agent or binder that provides a flexible layer between the fiber and the matrix.
A) Matrix
B) Reinforcer
C) Coupling agent
D) Interphase
The ratio of length (L) to diameter (D) of a reinforcing fiber is known as ______.
A) E-glass
B) Kevlar
C) Borsic
D) Graphite
Natural fiber ______ (据说优于) synthetic fiber.
In terms of modulus, which order (from low to high) is correct as far as glass, carbon, and Kevlar fibers are concerned？
A．Kevlar fiber, glass fiber, graphite fiber
B．Glass fiber, Kevlar fiber, graphite fiber
C．Graphite fiber, glass fiber, Kevlar fiber
