引起送话音小有杂音故障的原因是什么?
CRH1A型动车组“释放侧门”按钮(黄色)(),表示车门不可能释放,车速超过20km/h。 ["亮","闪烁","不亮","不变"]
下列哪项不是鉴别十二指肠钩虫和美州钩虫的形态学依据(). ["成虫的体形","成虫的口囊","雄虫的交合伞","雄虫的交合剌","虫卵的形态"]
十二指肠钩虫的体态(). ["呈“∫”形","呈蛇形","呈“(”形","呈“6”字形","呈杆状"]
混凝土外观检查中截面尺寸不得大于设计标准()mm。 ["10","8","15","20"]
叶片式空气流量计基于()原理对发动机进气量进行测量。