()即根据演练工作需要,采取必要安全防护措施,确保参演、观摩等人员以及生产运行系统安全
A、演练工作安全保障A
暂无解析
Writing：
Anoldsayinggoes“hastmakeswaste”.Writeacompositionofabout400wordstostateyourviewonit.
Iam____gratefulforthemanykindnessesyouhaveshownmyson.
U.S.News____________rankingsofcollegessince1983.Theyareaverypopularresourceforstudentslookingtoapplytouniversitycampus.
Thebeachisinanideal（）todrawtourists.
____whatmay,we’renotgoingtomakeanyconcessionstohisunreasonabledemands.
