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exercise chapter6
- exercise (6-2)part1 23:05
- exercise (6-2)part2 03:17
- exercise (6-1): exercise : 1 ,3 ,7, 10 ,12 , 17 , 22 28:10
- exercise (6-2) exercise: 6 ,9 , 22 , 24 ,41 39:16
- (6-3)exercise part1 19:06
- (6-3)exercise part2 14:56
- (6-3)exercise part3 16:07
- (6-3)exercise part4 23:55
- (6-3)exercise32,34 14:29
- (6-3)exercise 1,2,6,9,10,15,16 29:48
- (6-4)exercise 1,2,4,14 32:14
- (6-4)exercise 19,23 26:16
- (6-3)exercise 18 , 29 , 30 23:06
- (6-4)exercise 22 13:07
- (6-4)exercise,, 3,5,7,9 37:41
- (6-4)exercise 11,15,21,25,43 34:34
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exercise chapter6
