用“DF1”造句大全，DF1造句
DriverdevelopmentforDF1andCDMA/GPRSintegration;BasedonDF1protocol,thedesignandrealizationoftrafficlightscontrolexperimentwerestudiedusingRockwellcontrollerandRockwellsoftware....
如图，矩形ABCD的对角线AC，BD相交于点O，点E，F在BD上，BE＝DF.(1)求*：AE＝CF；(2)若...
问题详情：如图，矩形ABCD的对角线AC，BD相交于点O，点E，F在BD上，BE＝DF.(1)求*：AE＝CF；(2)若AB＝6，∠COD＝60°，求矩形ABCD的面积．【回答】：(1)*：∵四边形ABCD是矩形，∴OA＝OC，OB＝OD，AC＝BD，∠ABC＝90°.∵BE＝DF，∴OE＝OF.又∵∠AOE＝∠COF，∴△AOE≌△COF，∴AE＝CF...