简要分析文科卫支出的经济性质。

厄尔尼诺现象产生的原因之一是大气中二氧化碳剧增．为减缓此现象，应大力开发、使用的燃料是（　　）

A．脱硫煤

B．天然气

C．甲醇

D．氢气

下面哪个地形区有“塞上江南”的美称[ ]

A、内蒙古高原

B、黄土高原

C、宁夏平原

D、华北平原

患者，男32岁，52天前，右前臂因锐器刺伤，经清创缝合，现伤口愈合，但遗有爪形手畸形和骨间肌萎缩，该患者最可能损伤为

A．桡神经损伤

B．骨间肌损伤

C．尺神经损伤

D．正中神经损伤

E．正中神经和桡神经损伤

Most IP layer-based proxy mechanisms, such as network address translation (NAT), only support uni-directional proxy, from the internal network to external network (the Internet). The proxy establishes the communication channel by (66) IP addresses. The IP addresses must be (67) . These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels, such as, multimedia applications. IP layer-based proxy mechanisms need additional software (68) for each application that uses (69) channels. SOCKS identifies communication targets through domain names, overcoming the restriction of using private IP addresses. SOCKS can use domain names to establish communication between separate LANs, with (70) IP addresses.

A．manufacturing

B．manipulating

C．conduct

D．implement

在普通法系国家，正式法源最主要的形式是（）

A.制定法

B.判例法

C.习惯法

D.惯例