I'm considering______a teacher after graduation because a teacher is often considered______the engineer of human souls.
A：to become；to be
B：to become；being
C：becoming；being
D：becoming；to be
— I think it's Mr. Zhang.
可把 ①N2和CO2 ②O2和CO2 ③CO和CO2三组中每一组的气体物质分别区别开来的共同方法是 ( )
一物体从高处自由下落，经2秒落地，则该物体下落1秒时，离地高度是（ ）
春秋时期，孔子兴办私学，学生来自士农工商各个阶层，这说明（ ）
