题目

在世界无烟日宣传活动中，某学生设计了如图所示的实验装置。该装置中的澄清石灰水可以检验香烟燃烧是否有气体生成。为了使香烟燃烧产生的气体通过澄清石灰水，活塞应向移动。 答案：【1】二氧化碳【2】右根据情景，从方框中选出正确的选项，其中一项多余。 A. Go along this street, then turn left at the second turning. B. Which bus do I need? C. Can I take a bus? D. You’re welcome. E. But where’s the bus stop? F. But where’s the park? A: Excuse me. Where’s the Linghu Park? B: ______ A: How far is it from here? B: It’s about thirty minutes on foot. A: ______ B: Yes. A: ______ B: The No. 8 bus. A: ______ B: It’s on the other side of the street. A: Thank you very much. B: ______1.________2.________3.________4.________5.________