【判断题】T F 12. If short-term sleeping problems are managed properly from the beginning, they will not affect health.
【单选题】— Will Jack need your help? — I won ’ t help him ______ he asks me properly. A. if B. so that C. as long as D. unless
【判断题】本征半导体不带电,P 型半导体带正电,N 型半导体带负电。( )
【单选题】We usually judge others by seeing if they dress themselves properly in public.
【判断题】本征半导体不带电,P 型半导体带正电,N 型半导体带负电。
【简答题】英译汉: ¡ If the computer wasn ’ t shut down properly, it will probably run a program to scan the hard drive for errors and try to fix them if found. (Windows users: If the computer prompts you to fix a ...
【单选题】If you become so stressed that you can ’ t function properly, you should seek _______ help.
【判断题】N型半导体,P型半导体中的多数载流子性质不同,N型半导体带负电,而P型半导体带正电,所以PN结形成内电场。