唇的英文名称是()。 ["neck","lip","eyebrow","ear"]
什么叫仪表的比例积分调节?
ultravioletray的中文名称是()。 ["声波","微波","红外线","紫外线"]
某轮由44°N起沿子午线向南航行,计程仪读数差为240',△L=0%,不考虑外界影响和航行误差等,则到达点的纬度()。 ["A.等于40°N","B.大于40°N","C.小于40°N","D.无法确定"]
某轮由赤道起沿子午线向北航行,计程仪读数差为720',△L=0%,不考虑外界影响和航行等误差,则实际到达点的纬度()。 ["A.等于12°N","B.大于12°N","C.小于12°N","D.无法确定"]
用酒精计测量酒度时,水平观测与()相切的刻度示值。