When Andrea Peterson landed her first teaching job, she faced the daunting task of creating a music program with almost no money for equipment or supplies in a climate where standards-based learning w
Pirates from Somalia who hijacked _____European carrier in ______ Indian Ocean threatened to kill its 25 crew members if any rescue operation was attempted. A．the; 不填 B．a; the
，点A与D，B与E分别是对应顶点，且测得
，
，则
长为 （ ）
