孔子的生日是哪一天?()
每单缸气缸压力值与测得的平均值相比,汽油机应不大于(),柴油机不大于() ["A、10%,8%","B、10%,12%","C、8%,10%"]
艾滋病的病原学特点是() ["对紫外线敏感","耐热","其基因组有两条正链RNA","分HIV-1、HIV-2、HIV-3三型","单链RNA病毒"]
艾滋病的传播途径是() ["日常生活接触传播","血液传播","粪-口途径","性接触传播","空气飞沫传播"]
蓄电池电解液液面应高出极板上端40——50mm
变压器运行前,在什么情况下可不用吊心检查?