【单选题】Prof. McDonald said, “I regret ______ that this piece of writing is not well-focused.”
【多选题】企业在市场上所面对的竞争者大体上可分为( )
【简答题】Java源程序名为Test.java,运行它的Java程序的命令是( )。
【简答题】Prof. McDonald said,“I regret ______ that this piece of writing is not well-focused." (say)
【简答题】FCX Clarity采用的燃料电池是( ),蓄电池属于( )。
【单选题】Prof. McDonald said, "I regret _________ that this piece of writing is not well-focused."