【单选题】当PN结加上正向电压时,其空间电荷区将( )。
【单选题】Only when he failed ______ the stress he was under.A.he realized B.did he realizeC.realized heD.
A.
32. Only when he failed ______ the stress he was under. A.he realized
【单选题】Only when he finished his homework ___________that he had made a mistake
【单选题】It was not until he entered the classroom ______ he realized that he had forgotten to do the homework.
【单选题】It was at that school _________ he realized his dream _________ he was going to be a teacher.