一元二次方程x²﹣4x+4=0的解是____．

多音字组词。

觉  jué ____ jiào____     重chóng____  zhòng____ 

还 hái  ____ huán____      藏 cáng____   zàng____                                      

—Have you written anything on Chinese traditional medicine so far?
— _________, but I have a plan for it.