What is true regarding Autonomous Systems (AS )?()
AS numbers are assigned by the IANA
B. AS numbers are used by BGP (Border Gateway protocol ) to exchange IP routing information with neighboring AS
C. In the internet, an Autonomous System (AS) is a collection of IP networks and routers under the control
D. All of the Above
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电雷管在使用前必须逐个检查,电雷管电阻误差()超出允许范围。
A. 不能
B. 允许
C. 应为
埃里克森指出,出现日益明显的探索行为,迫切地要表现自己的年龄是()
A. 一二岁
B. 二三岁
C. 三四岁
D. 五六岁
钢管脚手架的立杆最下部,离地面20cm处,必须设置纵向与横向扫地杆。()
A. 正确
B. 错误
婴幼儿学步后会出现“O”、“X”形腿,或出现多汗、睡眠不安的体征时就要引起重视,考虑可能是()。
A. 贫血
B. 肠胃炎
C. 佝偻病
D. 智力低下