A:齐桓公
B:晋文公
C:秦穆公
D:楚庄王
下列离子方程式书写正确的是( )
①1.8:0.25化成最简整数比是____,比值是____。
②0.8: 415 化成最简整数比是____,比值是____。
The smile on the teacher's face showed she was ______ with my answer.