蚊虫对杀虫剂最敏感是什么阶段() ["成虫","卵","蛹","1—3龄"]
机动车的离合器应接合平稳,分离彻底,工作时不允许有()等现象。 ["A、正常打滑","B、异响","C、抖动","D、不正常打滑","E、踏板力大于700N"]
一切建(构)筑物、设备,均不得侵入()。 ["铁路建筑限界","股道","站内"]
新建工程竣工后,应按规定进行验收,并进行()。改建工程竣工后,应按规定进行验收。 ["动态验收","安全评估","静态验收"]
库蚊的卵是园锥形,无浮囊,且() ["单个散产,浮于水面","单个散产,沉于水下","有浮囊,浮于水面","成筏状,浮于水面"]
焦油馏分的加工主要包括哪些内容?