Apex domains cannot have CNAME records.
Question and response
Question
dig ch.GOVORIT.RU. NS
Answer
ch.GOVORIT.RU. 5 NS mx2.ch.GOVORIT.RU.
ch.GOVORIT.RU. 5 NS mx1.ch.GOVORIT.RU.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0