7.2+2.8*3.6怎样简便计算 7.2+2.8*3.67.2+1.4*2*3.67.2+1.4*7.27.2*（1+1.4）7.2*2.417.28
跟上老师推荐新海宜了，老师真是火眼金睛。 恭喜老铁跟上。
1、瞧！孩子们在动物园里玩的十分高兴。 1.Look。Children is very happy playing in the zoo.应该是：Look。Children playing in the zoo's very happy.2.Weather winter in Shijiazhuang is clod and windy.应该是：Shijiazhuang cold and windy winter.希.
