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教室內

封面

speaker

1

projector

2

microphone

3

ceiling fa ..

4

organ

5

platform

6

eraser

7

trash can

8

mop

9

dust bin

10

broomstick

11

bulletin b ..

12

textbook

13

world map

14

blackboard

15

chalk

16

teacher

17

student

18

chair

19

desk

20