The second chapter tests the answers of volume B.

I. Multiple-choice questions: BDCDB II. Fill in the blanks (1 1) 3, -7 (2 points will be deducted for missing one item) (13)10xx (15) 0 or 4 III. Problem solving 17, (1 17, 1) 40 ((3).

1 3

A: The fuel consumption of * * * on this day is 68 liters, 20. Solution: 34-a-(A 3)-(2A3) (1) = 28-4A When a=6, 28-4a=28-4×6 =28-24=4 A Answer: Fourth. When a=6 ㎝, the length of the fourth side is 4 ㎝. (2) No, because when a = 7,28-4a = 28-4× 7 = 0, the length of the fourth side is 0 ㎝, and this figure is a triangle.

(It should be this volume. I've been looking for it for a long time. You can ask if you don't understand. )