校正原料一般分为()校正原料,()校正原料,()校正原料。
参考答案:铁质,硅质,铝质
—What a great grade Jane got in the Maths test!
—_______. She works the hardest in our class.
A.Many hands make light work
B.The grass is always greener than the other side
C.Early birds catch the worm
D.Don’t put all your eggs in one basket
简述初中生思维发展的阶段。