Which statement is true about Foreign Exchange Station (FXS) ports on a router?()
A. The FXS interface allows an analog connection to be directed at the public switched telephone network (PSTN’s) central office.
B. The FXS interface connects directly to a standard telephone,fax machine,or similar device and supplies ring,voltage,and dial tone.
C. The FXS interface connects directly to an IP phone and supplies ring,voltage,and dial tone.
D. The FXS interface connects directly to ISDN voice channels.
具有"叶痕呈三角形,左右交互排列,有的其上有鳞毛状的叶基残余"特征的中药材是()
A. 延胡索
B. 羌活
C. 黄精
D. 续断
E. 石菖蒲
2009年7月,美国能源部向国会递交了第一部《复苏与再投资法案》,制定了评价指标体系,对美国智能电网的发展现状进行了评价。
A. 正确
B. 错误
中组发[1982]13号文件规定,建国前参加革命工作未担任司局(地专)级职务的行政十四级以上老干部离休后,一般可享受什么级的政治、生活待遇?