1 Giving definitions 1
2 Classification 7
3 Description 1:occupations 13
4 Description 2:size ＆ prospects of a company 18
5 Revision 25
6 Description 3:properties ＆ abilities 32
7 Description 4:structure ＆ function 38
8 Description 5:conditions ＆ problems 44
9 Description 6:process ＆ method 50
10 Revision 57
11 Introducing an idea 63
12 Developing an idea 1 69
13 Developing an idea 2 75
14 Concluding an idea 82
15 Revision 89