A:12米/秒
B:8米/秒
C:6米/秒
D:8米/秒
将一元二次方程4x2+5x=81化为一般形式后,二次项系数、一次项系数、常数项分别为( )
A:Good morning.
B:____
A:I am Li Fei.____
B:My name is Wang Qiang.
A:____
B:Yes,I am.
A:I am twelve.____
B:I am twelve too.
B:OK! Let's go.
A.Good idea!
B.How are you?
C.Good morning.
D.What about you?
E.What's your name?
F.Are you from Beijing?
G.Let's go and play football.