A:change
B:has changed
C:changing
D:have changed
读《那树》,怎样理解文中所写的蚂蚁国的故事?
60×5=____3×80=____270–90=____ 720-400=____ 0×7= ____
21×4=____ 7×8+6=____ 20×3+17=____ 76×9≈____ 106×5≈____
写出反义词
裸露——____ 扩大——____