1?????????????4??????????????,????????????36????????????????,???????????????,??????????????????????12??30?????60???????2?????????2???0.5????????????,???????????????????????,???????,?????

??? ??????

?:????????????????

??“?????”

?? ????????????36? 12???????????

????:1??????:??????

2?????

3???????

4??????

5???qt?????

1?????????????4??????????????,????????????36????????????????,???????????????,??????????????????????12??30?????60???????2?????????2???0.5????????????,???????????????????????,???????,?????

??? ??????

?:????????????????