They really just vary from denomination to denomination, but the main one is to believe that Jesus is the Messiah, and that he is the only Way to God.
Christianity does not have any rules about what you can or can not eat.
Some special rules made in tennis is that if the ball bounces on your box you will be out.
Ethiopia
God's Word, the Bible
No but their are rules when your their
Christianity has no rules about this and abides by the local laws of whichever country they are marrying in.
There are no special rules that need to be followed to hold or handle a Bible. The book is there to be read, that is what it is for.
Christianity has many denominations and sects, each with their own set of rules. Christianity is not a religion, it's many, many religions. The most common denominator among Christians is the Christian Bible, the new testament, and the ten commandments. Each denomination or sect has their own interpretation of these and has devised their rules according to their interpretation.
The 10 Commandments, also known as the Decalogue.
As far as I know horseradish is not mentioned in the Bible and so has no special meaning in Christianity
what is the four letter DNA alphabet and what are the special rules by which the alphabet pieces bond together
Yes, the special book is called the Holy Bible.