Amy and her family ____ over the winter holiday.Hainan is ____ their home, so they went there ____. Sanya is a good place to visit. The weather is ____. The ____ is beautiful. Amy took lotsof pictures there. She ____ in the sea, too.
在直角△ABC中,∠C=90º,AC=BC,BD平分∠ABC,DE⊥AB于E,若CD=3,则AD的长度是( )
①小葱拌豆腐——____
②竹篮子打水——____
如图表示人体血液流经血管a、b、c时,血液含氧量与血压的变化,下列有关叙述正确的是( )