有关农耕区畜牧业和牧区畜牧业的叙述，正确的是 (      )

A．牧区拥有广阔的天然草场，适宜放牧牛、马、羊等多种牲畜

B．农耕区畜牧业主要利用人工草场饲养牛、马、羊等多种牲畜

C．目前农耕区畜牧业在我国畜产品中占次要地位

D．牧区畜牧业是我国城乡人民食用肉、奶、禽、蛋的主要来源

Long-Term Evolution (LTE) is a technological standard for wireless mobile broadband networks. LTE will make the use of the latest technologies. Orthogonal ______ Division Multiple Access ( a technology well suited to achieving high peak data rates in high-spectrum bandwidths) will be used on the downlink. On the uplink, LTE will use ______ Carrier Frequency Division Multiple Access, which offers advantages in power ______ and terminal battery life as compared to technologies used today. The latest antenna technologies will also be used, such as ______ , which employs multiple transmit and receive antennas. This results in numerous data paths effectively operating in ______ and-through appropriate coding/decoding-significant throughput gains.

A. UWBB. MIMO
C. ASON D. SCDMA