Which two subnetworks would be included in the summarized address of 172.31.80.0 /20?（）

[单选题]UM2000型无绝缘轨道电路在区间两端均为电气绝缘节时，极限长度为（）

[单选题]谷胱甘肽过氧化物酶中含有（）

[单选题]快开门压力容器如安全联锁装置失灵时，一般不准使用。（）

[单选题]李某，男，33岁。因天气寒冷，于房间中放置一煤烟炉取暖，且门窗紧闭。家人回去时发现其昏倒在地，遂被送往医院。可能的诊断是（）

[单选题]对IPv6与IPv4的关系，下列描述正确的是（）

[单选题]大便时溏时泻，稍进油腻之物，则大便次数增多，饮食减少，食后脘闷不舒，面色萎黄，肢倦乏力，舌淡苔白，脉细弱。治法为（）

[单选题]低容量性高钠血症脱水的主要部位是（）

[单选题]感知过的事物重新出现在眼前时能够识别出来，这是（）

[问答题]简述教师自我更新的主要内容。

[问答题]台湾居民在大陆逾期居留应如何处罚？

[多选题]Which two subnetworks would be included in the summarized address of 172.31.80.0...

[多选题]Which two subnetworks would be included in the summarized address of 172.31.80.0...

[多选题]Which two subnetworks would be included in the summarized address of 172.31.80.0...

[多选题]Which two subnetworks would be included in the summarized address of 172.31.80.0...

[单选题]The topic of this passage can be best summarized as ______.

[单选题]How many subnetworks and hosts are available per subnet if you apply a /28 mask ...

[单选题]There are 3 steps to confirm whether a range of IP address can be summarized. Wh...

[单选题]Which of the following is NOT included in the mission?

[单选题]What is NOT included for every passenger?

[单选题]The premium is usually included in（）.