已知关于x的一元二次方程x2+3=4x,若用配方法解该方程,则配方后的方程是[ ]
A.(x﹣2)2=7
B.(x﹣2)2=1
C.(x+2)2=1
D.(x+2)2=2
答案:B
按顺序把下面的韵母补充完整。
a( )e( )u üai( )ui( )( )iu ie
( ) er an en( )( )ün ang ( )( )ong
_____ and happy, Tony stood up and accepted the prize. [ ]
A. Surprising
B. Being surprised
C. Surprised
D. To be surprising