however和nomatterhow的区别Itisreportedthatalargenumberofcitizensinharbinenjoyswimming____A.nomatterhowcoldisitB.howevercoldisitC.nomatterhowitiscoldD.howevercolditis这题选什么,为什么,还有however和nomatter

　　however和nomatterhow的区别

　　Itisreportedthatalargenumberofcitizensinharbinenjoyswimming____

　　A.nomatterhowcoldisit

　　B.howevercoldisit

　　C.nomatterhowitiscold

　　D.howevercolditis

　　这题选什么,为什么,还有however和nomatterhow有什么相同点和不同点,是however可以引导名词性从句,而nomatterhow不可以么?还有coldisit和isitcold

　　那这个是however引导的名词性从句，它是主语从句、宾语从句、表语从句还是同位语从句呢？

　　这个应该是让步状语从句吧