扩血管活性药是() ["硝酸甘油","阿拉明","多巴酚丁胺","酚妥拉明","新福林"]
MRP系统中,当月的生产与装配计划一般是按()编排的。 ["天","周","时","月"]
离心式压缩机的总压力比为5~9时,中间冷却的次数一般应为() ["l","2~3","3~5","4~7"]
跨国间的物流、信息和资金流动是指()。 ["全球物流","设施物流","企业物流","供应链物流"]
一种菜肴现在售价是48元,比原来提价20%,其原售价为()元。 ["38","40","42","36"]
什么是受体的激动剂?