9.
指出下列各式中哪些是单项式,哪些是多项式,哪些是整式?
\(x^{2}y^{2}\),\(y-x\),\( \dfrac {a+b}{3}\),\(10\),\(6xy+1\),\( \dfrac {1}{x}\),\( \dfrac {1}{7}m^{2}n\),\( \dfrac {2}{x+x^{2}}\)
单项式:\(\{ \)___________________________________________________ \(\}\)
多项式:\(\{ \)___________________________________________________ \(\}\)
整 式:\(\{ \)___________________________________________________ \(\}.\)