????????????2??????,??????2??????????,??????2?????????

1.20?????20??????:???????,???????????????,?????????????,???????????????,???????????,?????????!

2.30?????????30???????????:30±????(?????+??-),?δ?????????????С??

3.50?????50???????????:50±(????×2) (?????+??-)

4.65?????65???,???????:65±(????×2) (?????????-)

65????????,???????????????????????淨(jìng),?????????????

??????,???????????????????,???????,????.?????????,?о?????,?????????

???????????????,?????90-100??(??????????95??,???????????90-100?????????)

??????:90-????±(????×) (?????+??-)

???????

?????????:90+????±????×2(?+??-,????????С???,???????????)

5.???????

??????1??

[?????9??]

????????????????????(????????????????????9????????????????????????????巽????????????С??????)???????100??????任??????????

??????2??

[?????10??]

????????????????????(????????????????????10????????????????????????????巽????????????С??????)???????94??????任??????????

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