To his parents' d____ (高兴), he has made a full recovery after the accident.
This is the first time that a woman ________ to the post of sales director in this company. ( )
古诗文名句填空。
国家队运动员常来昆明海埂基地集训的主要原因是( )
生产与生活中我们可以利用重垂线来检查物体是否____ 或____ .