it is of great help to me.这句中为什么要加个of,求各位回答,

it is of great help to me.这句中为什么要加个of,求各位回答, While the internet is of great help. they all believe it is in great help to students为什么将in改成of, the book is of great help的同义句 Befofe you go to another country it is a great help if you know the language and some of the customs of the country. This type of computer is of great help and I'll buy it_A.however may it cost B.no matter how much it costC.however much it is cost D.however much it may costB为什么错,D为什么对? It is of great +名词is of great 这结构是怎样的?怎么用? 求翻译：Before you go to another country it is a great help if you know the language andsome of ...求翻译：Before you go to another country it is a great help if you know the language andsome of the customs of the country. The internet is of great help.那of在此做什么用, Climbing hills is of great help to our health.为什么用of? it is great同义词 it is great How is it ( ) .Great It is very great（）you to help the disabled children Reading aloud is of great help to our english study 分析句子结构并翻译 Miss White believes traveling is of great help in learning什么意思 英语翻译：It is good of you to help us. it is kind of you to help others的意思