每个高温配合、联接装配件必须沾石墨油膏或白垩油膏装配,关于沾石墨油膏或白垩油膏装配的目的的说法,下列哪项选项是错误的?() ["A、润滑","B、防腐","C、防烧结","D、上述说法都不正确"]
何谓双向应力椭圆?何时考虑双向应力?
室分系统设计中,有PS、T、ANT等常用英文缩写,其中T代表?() ["A、功分器","B、耦合器","C、天线","D、馈线"]
对待客户投诉应做到() ["以礼相让","克已忍让","耐心回答","合理处理","据理力争"]
用于治疗动物蠕形螨、滴虫有效药物有() ["磺胺类","四环素类","硝基咪唑类","喹噁啉类"]
钢丝网架水泥夹心隔墙成品保护的措施常采用的手法是什么?