?????

1. ??????

(1)??????????????40??????????????????;

(2)????????????????24????????????????????y???????

2. ??????

(1)?????????????????????????2??4??6???????????????????????????????????????????

3. ???????

(1)???????????????????+7??+10?????????????????????????????????????????

4. ?????

(1)???????????????????????3????8????12?????????????;

(2)?????????3??????(4-8??)???????Σ????????????????????????;

(3)?????????8??????(9-20??)???????Σ?????????????????????????;

5. ???????

(1)????????????????????????15????25????20???????????????????????????????????????;

(2)????20????????￡???????????1???????????????20?????????2???????????????

6. ??????

(1)?????????????????????35????45????50???????????????????????????????????????;

(2)??????????????1????????????????

7. ???????

(1)???????????????????2????10???????ο?????????????????????????????????

8.????????

(1)????????????????????????????????????????????????????

(2) ???????????7??24?????????????????y????????

(3)??????а??????????????????7??????????????????????.

?????????????40407?????????http://audiogearreviews.com/zxyou/