从事高处作业的工人，必须年满（）周岁。 16。 18。 20。 25。
中国古代雕刻艺术的特点。
脂润滑
In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ）， what does SNR IN represent？（） the signal to noise of the current optical amplifier。 the signal to noise of the previous amplifier or source。 the signal to noise introduced by the optical multiplexer。 the accumulated noise to signal ratio of the optical channel。
Which two of the following are valid CRS deployment scenarios?（） IPCC Express communicating with the ICM via a standalone IPCC Gateway PG running on an expansion server 。 IPCC Express communicating with the ICM via a co-resident IPCC Gateway PG。 IPCC Express using the IPCC Enterprise Outbound option 。 IPCC Express using the IPCC Enterprise CTI-OS Toolkit 。 IP IVR integrating with IPCC Enterprise to function as queue point and self-service platform。
Which is a legitimate bandwidth matched pair?（）
