2.15小时=______小时(填分数)
0.15小时=320小时,
320+2=2320(小时).
故答案为:2320.
方程x2-3x +2 =0的解是[ ]
A. x1=1,x2=2
B. x1=-1,x2=-2
C. x1=1,x2=-2
D. x1=0,x2=2
Today is _____ day of the week.
A. first B. one C. the first