代谢
Which of these statements about penultimate hop popping are true？（） ["It is used only for directly connected subnets or aggregate routes","It can only be used with LDP.","It is only used when two or more labels are stacked.","It enables the Edge LSR to request a label pop operation from Its upstream neighbors","It is requested through TDP using a special label value that is also called the implicit-null value.","It is requested through LDP using a special label value that is also called the implicit-null value."]
统一式燃烧室
阳光体育长廊锻炼项目中，“梅花桩”的功能是（） ["锻炼大腿肌肉群、小腿肌肉群、膝关节，偏重速度控制能力，克服运动心理障碍","锻炼大腿肌肉群、小腿肌肉群、膝关节，偏重高感知能力、体能，克服运动心理障碍","提高下肢力量和跳跃能力，提高踝关节力量","锻炼脚弓，踝关节，跟腱，小腿肌肉群"]
中国教育管理学在新世纪肩负重大使命是（） ["本土化","科学化","现代化","实务化"]
心情一致性
