【单选题】The boss of the company had _________ his friend’s good advice, which led to the failure of his business.
【简答题】多组分精馏中,关键组分是指( )的组分。
【简答题】多组分精馏中,关键组分是指( )的组分。
【单选题】______ the advice of his friends, he would not have suffered such a heavy loss in his business.