There are many reasons why customers lack sufficient security measures on the network. Which two reasons for insufficient security are typical of the customers today?（） ["the desire to avoid unnecessary technologies","the belief that free security tools are sufficient","the perceived costs of security solutions","the use of hosted email services eliminating the need for local security","the lack of threats to their network","the lack of risk analysi"]
20世纪初英国放弃“光荣孤立”（不与欧洲大陆国家结盟）政策转而与法国、俄国结盟的最主要原因是（）。 ["军事力量明显削弱","三国同盟已经形成","霸主地位业已丧失","英的矛盾急剧上升"]
浅孔固结灌浆压力，有盖重时可采用（3～7）×105Pa；无盖重时可取（2～5）×105Pa。
患者，男性，左侧胸部被匕首刺伤致胸痛、呼吸急促半小时，查体：脉搏120/min，血压9.3/5.3kPa（70/40mmHg），口唇发绀。左侧胸壁有伤口，呼吸时能听到空气出入伤口的响声，气管移向健侧，患侧叩诊呈鼓音。应首先考虑此患者为（） ["闭合性气胸","开放性气胸","张力性气胸","损伤性血胸","胸壁软组织刺伤"]
根据计算机网络覆盖地理范围的大小，网络可分为广域网和（） ["互联网","internet网","以太网","局域网"]
移情能力的发展经历了哪些不同水平的发展阶段？
