【简答题】听音,完成句子。 1. Danny is sleeping. He's ______________. 2. I would like some ______________. 3. Who is it? It's ______________. 4. John is ______________ to her teacher. 5. My teacher speaks English ____...
【单选题】乙酰胆碱(Ach)是一种神经递质。实验人员欲研究Ach的浓度与反应时间的关系(简图如下图)。在除去突触小泡的前提下自①处注入不同浓度的Ach,②处给予恒定刺激,③、④两处分别,为感应测量点。测得不同浓度.Ach条件下③、④两处感受到信号所用时间如下表所示。下列叙述正确的是 [ ]
B.
实验中除去突触小泡的目的是防止实验结果受到相关因素的干扰
C.
表中数据说明高浓度的Ach能促进兴奋在神经纤维上的传导
D.
表中数据说明Ach浓度的增加对兴奋在神经元之间的传递无影响
【简答题】用“to, in, for, on”填空。 1. Who is ____________ your classroom? 2. What's ____________ the desk? 3. It's time ____________ Chinese. 4. Go ____________ the office. 5. I stay at home ____________ Sunday.
【简答题】u04p32.mp3: 2. Who is Alice most probably speaking to? ☐ A. s. ☐ B. Customers. ☐ C. Colleagues.
【简答题】用所给词的正确形式填空。 1. Who can help ___________ (I) with my heavy box? 2. I ___________ (row) a boat yesterday. 3. ____________ (be not) you a teacher? 4. Mike is ____________ (draw) a picture on the wall. 5...
【简答题】写出缩略式。 1. name is ________ 2. who is ________ 3. do not ________ 4. I am ________ 5. is not ________ ...
【简答题】完形填空。 Jenny, an ll-year-old American girl, spent the Spring Festival with her parents in China. Her 1 planned a good old-fashioned (老式的) Spring Festival celebration:a dinner of Peking duck 2 by watchi...