1，他们的结婚证是81年补发的，本人77年出生，直接公证或翻译这个可以吗？
-This 结婚证 may not be helpful because you were born before it was issued and thus USCIS will consider you were born before your parents got married. Thus, you also need to provide the evidences of your connection to your father since you was born to your 18 years old such as you were raised by your father and lived together with your father, your father paid tuition/fee for you, etc..
You had better try to see whether your parents can get the marriage certificate with the marriage date before you were born.
2，国内公证处让查查是否需要他们现在的合照。-Not need.
结婚证上有以前的照片。-Fine.
