【判断题】对文法中的某个非终结符A,无法从它推出任何终结符号串来,则有A出现的规则都为多余规则。
【单选题】Massive waves surged against large rocks that formed a waterproof jetty.
【单选题】—You have set aside more time to play with our kids. —I wish I ______, but you know how busy I was.
【单选题】( ) you have set out to do the work,you should try your best to finish it.
【单选题】Massive _______ surged against large rocks that formed a waterproof jetty.
【单选题】If you have set up a signature on your word processor, you can’t insert it under your name.