Multiple choice question: BCBDDDAB

Fill in the blanks (9) (10) x ≥-3 (11) 9.1×104 (12) cross (13).

answer the question

( 19) (20) (2 1) (22)( 1)

1 2 3 4

1 2 3 4 5

2 3 4 5 6

3 4 5 6 7

4 5 6 7 8

P (sum is 5)= (2) unfair, P (sum is greater than 5)=, P (sum is less than or equal to 5)=, rule: When the sum of two numbers is greater than 5, A wins; If the sum of two numbers is less than 5, B wins.

(23) (1) method 1: clockwise upward around the point, 4,4,90 p2 method 2: Q (1, 0) method 3: r (3,2) (2) omitted.

(24)( 1)②,(2) 120 ,(3) 1 180(4)0. 1

(25) ① ② ③ ④ Connect AA' to form an isosceles triangle ⑤ = 2 (∠ A+∠ B)-360.

(26)⑴K=-2，b=3-c⑵x≤-2，y 1≥y2； -2