ѧڿʼˣСǿʼµѧϰͬʱĸҲҪͯľҽݵʾ߳ɵڶͯҾûı𣬴Ӷ˼ҳԶͯҾӽĵġ
гʾй3.6ڵͯԼռ˿ڵ1/4żҳͯҾӣͯҾгڿۺϼҾҵҲͯҾϸгĸ
֪ƷƲ淶ҵķչͯҾҵûרҵġԵоҲûӦҵɱߡ淶ͬʻصضͯҾҵչIJ淶ĿǰͯڽȻݺӡ
1.ҾߵɫԽࡢԽкԽ
2.ѡһɫʵļҾֲ
3.ѡͯʽҾʱҪעǷ
4.ͯҾߴ粻Ҫ̫һǽϹ̶ҪòļҾ
5.ҾʱһҪںͬעȾ취
6.õͯҾӺõϰߺ
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