原产于美洲的巴西龟引入中国后，被不少人当成宠物饲养，然而，研究发现，繁殖力合捕食能力都很强的巴西龟一旦进入野生环境，就会掠夺本土龟类的生存资源，使本土龟类的生存受到严重威胁，世界自然保护联盟将其列为世界最危险的100个入侵物种之一，呼吁人们警惕巴西龟的侵害，这一警告的依据是（）

①尊重自然固有的客观联系，不能人为地干预生物的生存条件

②认识生物间的制约关系，不要人为地改变自然界固有的生态平衡

③认识环境的具体联系，尊重生物原有的生存条件和环境

④保护本土生物的生存环境，应防备和消灭最危险的入侵物种

A.①②

B.②③

C.①④

D.③④

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．availability
B．scalablity
C．security
D．efficiency