2????????????????????????????????????????????3????6g?3-6g?????3????????2-3?????????????????
3???????????20g????2????95%??l00??????????????????????1-3????????
4??????????l5g???12g????30g????30g????l5g???l2g????lOg????12g????9g???12g????12g????5g?????????
5????????????10g????10g???10g???15g???20g???6g???6g???6g????10g????5g???6g????10g??????????4????????62???????66.2%?
6???????????????????????????????????????????75%????7????????????l0?????????????????????
