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Beijing normal university printing plate fourth grade second volume new mathematics basic training unit 4 test answer
Answer: 1, connection (note: the first line is indicated by 1233; The second line is denoted by abc)

①? c； ②? a； ③? b

2、? 、△、O

△、O？

△、? 、O

△、O？

o 、△、?

judge

( 1)?

(2)?

(3)?

Step 4 choose

( 1)C

(2)B

(3)2、3、 1

5、4

6. Omission

7. Take a ride to fill it out.

( 1)①②

(2)②④

(3)③④

(4)③

8、( 1)63

(2) 12; 10

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