方程x2+1=2的解是______.
移项,得x2=2-1,
合并,得x2=1,
开方,得x=±1.
— What does your English teacher look like?
— She’s tall and thin ________ long hair.
A.have
B.has
C.there is
D.with
牵引电动机全悬挂分为架悬式和体悬式。