[问答题] 简述学前儿童皮肤的特点。

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"] 戊戌变法失败后，有六位维新志士同遭杀害，史称“戊戌六君子”。下列人物中，（）不属于“戊戌六君子”。 ["康有为","梁启超","刘光第","杨锐"] 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"] 《热河日记》的作者是？（） ["朴民赫","朴燕岩","李学明","李武龙"] 简述学前儿童皮肤的特点。