????20

1.??6311?δ5??20??????,??????600??м?3000???10000???′???10?

2.?????530????200??

3.????????50??50?????500?2000???

4.???????3000??????5~10??

5.??δ????1000??50?????′?????100?

6.?????30?????30?

7.?????????????,??λ50%н?

8.??У?л裺??У??????Χ???????100?

9.????????????100?

10.?????????????齨300??20??

11.??????????100????????20%???

12.???δ5?1?????????90?220????