【单选题】Has everything _____ can be done ______?
D.
what; already being done
【单选题】___________ have you ___________ the meat?
【单选题】Sefiously, though,there’S always something you wish you have not done ,but what is done
【判断题】可以认为电力二极管是20世纪最早获得应用的电力电子器件。
【单选题】With the broadband technology companies can have all their operations done __________
【单选题】All __________ can be done has been done.
【单选题】再同坡屋面的水平投影中,若有两条脊线交于一点,则( )通过该点。