母亲杨某外出打工,将15岁的儿子小强留下长期单独居住。杨某的做法()。
A. 合法,可以改善小强的物质生活条件
B. 合法,可以提高小强的独立生活能力
C. 不合法,不得让不满16周岁者脱离监护单独居住
D. 不合法,不得让不满18周岁者脱离监护单独居住
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归因即对自我行为的原因分析,包括三个成分:内外源、__________和__________。
What is the most common cause of network congestion?()
A. aggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switches
B. speed mismatches when moving from a low-speed LAN environment to a higher speed WAN environment
C. flapping Ethernet interfaces caused by misconfigured LAN interfaces
D. flapping serial interfaces caused by misconfigured WAN interfaces
E. speed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment
塔里木试油、井下作业35MPa节流管汇待令工况常关的是()。
A. 节1
B. 节2
C. 节3
D. 节6
E. 节8、节9