【单选题】水平角测量时,角值β=b-a。现已知读数a为182°33′24′′,读数b为102°42′12′′,则角值β是( )
【单选题】The dictionary still ______ where I ______ it a moment ago.
【简答题】The dictionary still__________ where I _________it a moment ago. A lies; laid B lied; lay C laid; laid D lies; lay
【单选题】The dictionary still ______ where I had ______it before.
【单选题】已知ABCD是空间四边形形,E、F、G、H分别是AB、BC、CD、DA的中点,如果对角线AC=4,BD=2,那么EG 2 +HF 2 的值等于( )
【单选题】The dictionary still ______ where I ______ it last Sunday.