一般来说(shuō ),有500,600,800,1000,1200,甚(shèn )至2000,2500等,具(jù )体(😴)多少得根据(jù )自身(shēn )条件来确(🌎)定。就举个简单的例子(🤼):身(🔫)[展开全部]
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