2020年军队职称英语理工类重点词汇专讲：upgrade

　　upgrade解释：

　　n.向上的斜坡

　　vt.提升;使(机器、计算机系统等)升级;提高(设施、服务等的)档次;提高(飞机乘客、旅馆住客等)的待遇

　　upgrade语法：

　　n.名词。vt.动词，第三人称单数：upgrades;过去式：upgraded;过去分词：upgraded;现在分词：upgrading

　　upgrade同义词：

　　upgrade，improve，make better，better，perfect

　　upgrade造句：

　　He was upgraded to security guard.他被擢升为保安。

　　upgrade考试真题：

　　Medical facilities are being upgraded.

　　A.expanded　B.repaired

　　C.improved　D.transferred

　　「答案」A