--- What do you think of his idea?

--- It sounds               but it just might work.

Jim tried his best to raise his spirits though he failed the exam.      

单色光通过双缝产生干涉现象，同种单色光通过单缝产生衍射现象，在光屏上都得到明暗相间的条纹，比较这两种条纹(　　)

材料二：唐代有人写诗说“太宗皇帝真长策，赚得英雄尽白头”──摘自人教版历史教材