复用段倒换环是以()为基础的,倒换与否是根据环上传输的复()决定的。倒换是由K1、K2(B1~B5)字节所携带的()来启动的。
参考答案:复用段;用段信号的质量;APS协议
Chinese authorities said Tuesday trace amounts of atmospheric()from Japan have been detected in Beijing and many areas other than Heilongjiang in the northeast but stressed(强调)they pose no threat to public health.
A. radial
B.radiate
C.radiator
D.radiation
何谓玻璃分相?稳定分相与亚稳分相有何不同?