【简答题】用所给动词的适当形式填空。 1. He told me that he _____ (leave) for Shanghai next week. 2. She asked me why I _____ (be) late for school yesterday. 3. He asked me what I _____ (do) at that time last night. 4. Do y...
【简答题】He asked me, “Where have you bought the pen?”
【简答题】将直接引语变为间接引语 (每空一词)。 1. 'Where have you been these days?' he asked. He asked me ____ ____ ____ been ____ days. 2. 'I've found my wallet.' he said to me. He ____ me that he____ ____ ____ wallet. 3. 'I t...
【简答题】图10.2.7(a)所示的为一多谐振荡器,555定时器的内部结构原理图如图10.2.7(b)所示。已知R2=R1/3,求: (1)对应画出稳态时vC(t)及vO(t)的波形; (2)计算振荡周期T。
【简答题】在色谱分析中常用的检测器有 、电子捕获检测器两种浓度型检测器和 、 火焰光度检测器 两种质量型检测器、
【简答题】常用气相色谱检测器质量型的有 __________和__________;浓度型的有__________和__________。
【单选题】耐寒性宿根花卉的特点不包括
A.
冬季地上茎、叶全部枯死 冬季地上茎、叶全部枯死
【单选题】He asked me ________ with me.