未知题型 According to the passage, 'special cases' refers to cases that ______.A.students attend a school only part-timeB.students never attended a school they listed on their applicationC.students purchase false degrees from commercial firmsD.students attended a famous school

单项选择题 差分放大电路的主要作用是____。 A、稳定增益 B、克服零点漂移 C、扩展频带 D、提高输入电阻

未知题型 事件排序下列每道题给出五个事件，每个事件是以简短语句表述的，接着给出表示事件的四种假定发生顺序的四个数字序列，请你选择其中最合乎逻辑的一种事件顺序。(1)审查相关材料 (2)受理申请 (3)要求复审 (4)驳回申请 (5)同意注册 (6)申请注册商标D.6-(2)-(1)-(4)-(3)-(5)