I have a question, when i registered NVO account, just send the coin to the coin's address of each escrow? if so, how do u know how many i sent and i going to send several coins in it.
No. Read before you do anything or you risk losing money. The NVO team nor the escrows can't be held responsible if you lose money due to this. How to invest guide:
https://bitcointalk.org/index.php?topic=1917456.msg19226871#msg19226871