象我这样为老婆与未成年孩子在美国境内提交I-485，我是需要填写2份485还是1份485？
-Two, respectively, for your wife and kid.
如果是2份（老婆一份，孩子一份）的话，是不是需要为每份485准备相应的材料(比如：693、864？）？
-Correct.
那邮寄时是要分开邮寄，还是可以合并邮寄？
-Either is fine.
485的费用是按一份收还是二份收？
-Two filing fees. These two cases are independent each other.
我看到还有一个I-485A，这个表需要填写吗？
-If your wife's income or assets is not included in the I-864, no I-864A is needed. Otherwise, your wife needs to file I-864A with your I-864.
