RFE材料已經寄到USCIS,可不可以再加寄材料?
-Yes if the deadline does not pass yet. You may send all the materials again including the materials you sent previously for the RFE in case USCIS throw away one of your packet (equals to you first time response to the RFE. Enclose the copy of the USCIS RFE letter with the response materials).