2、I am by nature soft as silk,

题目

2、I am by nature soft as silk,
By nature too as white as milk;
I am a constant friend to man,
And serve him every way I can,
When dipped in wax or plunged in oil
I make his winter evenings smiles
3、Like grass it is green,but it is not grass;
Like blood it is red,but it is not blood;
It is round and smooth like a big egg

答案

cotton
soap