简述土壤库的特征。
In the Apache Web Server configuration， the command KeepAlive ON is used to（） ["Allow a CSS to probe the server","Allow a connection to be closed with a TCP RESET","Allow persistent connections","Allow the use of HTTP HEAD request"]
关于脑卒中患者肩痛的预防及护理措施错误的是（） ["预防为主","仰卧位时需在患侧肩胛下垫一软枕","加强关节被动活动","出现疼痛时制动，以免疼痛加剧","避免患手长期输液"]
古希腊先哲的代表人物（） ①泰勒斯 ②普罗塔哥拉 ③苏格拉底 ④亚里士多德 ⑤达•芬奇 ⑥莎士比亚。 ["①②③","②③④⑤","③④⑤⑥","①②③④"]
Which two statements about the best effort model for QoS are true？（） ["delay sensitive packets are given preferential treatment","the default policy identifies a delay sensitive class and default class","the default policy identifies a delay sensitive class， best effort class， and default class","the model is highly scalable","the model is still predominant on the internet F the model provides guaranteed service"]
功血
