| 1. | | | | | | | | | | | | | | | | | | | | | | | | | 2. | (1) | | | | (2) | | (3) | | (4) | 1 1 | 2 15~30 | | (5) | 10—15 1 3—5 | | 50% 500 ~ 800 70% | 600~800 50% | 800~1000 | | |