I. 1: d

2:B

3:A

4:B

5:C

6:A

Two. 7: 3/2

8:y=x+ 1

9:9

10:-2. 1

1 1:0 & lt； M< three

12:y=x-3

Three. 13( 1)y = 1/2 * x+2

(2) Sketch

14

( 1)y= 1/2*x+ 1

(2)3

15

s=-5/3*t+90

16( 1)y=-5x+40

(2)8 hours

17( 1) When 0≤x≤20 and y=2x.

At x & gt20, y=2.6x- 12.

(2)53m？

Volume b

I. 1: b

2:C

3:C

Two. 4:-3

5:y=-3x+ 10

6:(0,-2)

3.7( 1)S=3/2*x(0≤x≤3)

(2) Sketch

8. If there are X bottles in the filling production line, 1 hour fills 650x bottles, and 1 hour packs 750*(26-x) bottles. According to the image, 1 hour will leave 100 bottles of bottled yellow rice wine, so 650x-750 * (26-x) = 65440.