I'm t____.I need to drink some water.
读《地球上的五带》图,图中的温度带A的名称为( )
澳大利亚特有的动物是( )
玉米高茎对矮茎为显性,现在有高茎玉米进行自交,后代既有高茎又有矮茎,比例为3:1。令后代中全部高茎玉米再进行自由交配,则后代高、矮之比为
I went to school without ____ (eat) anything this morning.