Here's what Kaplan said: "Use like to compare nouns; use as to compare actions -- in other words, use as when what follows is a clause." For example: Like fine wine, fruitcake tastes better after it has aged. Dogs don't scratch up furniture, as cats often do.
In 'many of which are in middle management and light industry.'
'which are in middle management and light industry' cannot stand on its own. It's neither a question sentence, nor a phrasal noun. 'many of N ' can be a noun. If the sentence runs like 'many of Noun THAT SVO', it might be acceptable.
这道题目AS 是"正如..." 的意思, 但是我通过观察,发现这道题目的关键不在于AS,而在于"in", In Hungary, as in much ,根据平行, 后者也应该有介词in ,否则意思就完全不一样了,一个表示 "在哪哪.", 而另一个是"哪哪哪" ,显然有问题. 于是就只有AC, 但A得which 这种用法是错误的, 只有 many of them 或者who/ whom 这种用法当表示人时,故只能选C了.