“星球大战”计划是由哪个国家提出的() ["苏联","美国","英国","法国"]
五加皮的功效是() ["祛风湿、利尿","补肝肾、强筋骨","退虚热、清湿热","通血脉、化热痰","解暑湿、止呕吐"]
证券经纪商是证券市场的中坚力量,其作用主要表现在()。 Ⅰ.充当证券买卖的媒介 Ⅱ.提供信息服务 Ⅲ.直接买卖证券 Ⅳ.擅自改变委托人的意愿 ["Ⅱ、Ⅲ","Ⅰ、Ⅱ","Ⅰ、Ⅲ","Ⅲ、Ⅳ"]
五加皮的主治证是() ["风湿痹痛,四肢拘挛","肝肾不足,腰膝软弱","肾气不固,遗尿白带","水肿,小便不利","妊娠呕吐,胎漏"]
同一零件在分别进行以下几种热处理工艺后,硬度最低的是()。 ["退火","正火","淬火","渗氮"]
CPD保存液有些什么成分?有什么优点?