根据所给词的适当形式、音标或语境的提示，完成短文。

      Watertown is a great place for a family to take a vacation. Teenagers want to visit the world's ____ (large) water slides and eat at the Uncle Bob's. A different rock band ____ (play) at Uncle Bob's every night. Kids will enjoy the Clown City Café. They have organized games and the staff dress up  ____ (æz)clowns(小丑).

      There is also a lot for parents in Watertown. ____ (if) they love good food, they can find it at the Farmer's Market where the food is both ____ dɪ'lɪʃəs and cheap. While the children have fun, parents can take dance lessons on the beach. And ____ ('evribɒdi) can learn something in Watertown. There are three ____ (museum). Teenagers love the Sports Museum and kids enjoy the Science Museum. Parents will spend many hours ____ (walk) through the History Museum.

《记住乡愁》开篇之作《培田村——敬畏之心不可无》呈现了连城培田深厚的客家文化传统，片中展示的对天地、祖先、圣贤的敬畏之心和浓浓的乡愁，引发了海内外华人观众强烈的共鸣。这种共鸣（    ）

已知f（x）=log₃x，f（a）＞f（2），那么a的取值范围是（   ）

马克思主义哲学认为：“世界的真正统一性在于它的物质性。”下列能够说明材料中观点的是(　　)
①自然界是物质的
②人类社会是物质世界长期发展的产物，劳动创造了人类社会
③人的意识一开始就是社会的产物
④从构成要素来看，人类社会在本质上是一个客观的物质体系

PM2.5是指大气中直径不大于2.51μm的颗粒悬浮物，能被肺泡吸收并进入血液，影响人体健康。某科研队伍成功研制出PM2.5净化器，其原理如图所示。闭合开关S₁、S₂后，风扇旋转吸入含有颗粒物空气，当颗粒物接近带有负电荷的光洁金属网C时会被快速吸引过来，这是因为带电体具有吸引____ 的性质；当颗粒物快速通过光洁金属网C后，会带上负电荷，然后被带有正电荷的棉芯D吸附住，这是因为____。