A:(1)(2)(3)
B:(2)(3)(4)
C:(1)(3)(5)
D:(2)(4)(6)
图中温度计的分度值是
用配方法解方程x2+4x+1=0时,经过配方,得到( )
从方框中选出下列各句的最佳应答语。
A.I'm drawing a picture.
B.Yes,it can.
C.No,she isn't.
D.They're Liuwei's.
E.They're having dinner.