20世纪60年代起，屠呦呦团队从《肘后备急方》等中医药古典文献中获取灵感，先驱性地发现了青蒿素，开创了疟疾治疗新方法。这一事例，说明了中华文化（    ）

①源远流长      ②唯我独尊        ③博大精深           ④一脉相承

根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。A：Hello, Sean．
B：Hi, Peter． ____
A：No, I don't． ____
B：She's Tracy．She is my sister's friend．
A： ____
B：Yes, my sister always tells me her things (事情)．I even(甚至)know her eating habits．
A：Really? ____
B：She likes milk and eggs for breakfast．She likes vegetables for lunch and fruit for dinner．
A：I think she eats well．
B：Yes, and she always plays tennis. We must learn from(向……学习) her. ____
A：OK. Let's meet at 5：00．

A．Who is she? B．What are they? C．Do you know her? D．Is the girl your sister's friend? E．The girl's eating habits are very good． F．What about playing tennis after school? G．Do you know the girl in green in Class Four?

某同学做麦芽糖的还原性实验，取4 mL 0.5mol·L^－1的CuSO₄溶液和4 mL 0.5 mol·L^－1的NaOH溶液，将它们混合后，滴入1.0 mL的10％麦芽糖溶液，加热煮沸，结果没有看到红色沉淀生成，这是因为                    （    ）

The thief was caught because the alarm             when he was stealing money from the shop.

端午粽飘香，下列制作粽子的过程有新物质生成的是（  ）