题目

听下面一段独白，回答以下小题。 （1） Why is the plan for the visitors changed? A . Lack of time. B . Bad weather. C . Lack of money （2） What does the speaker say about the museums at South Kensington? A . They are free on Thursdays. B . They are close to each other. C . They are open on different days. （3） When will the speaker probably leave the National History Museum? A . At 1 pm. B . At 3 pm. C . At 6 pm. （4） What is the last stop of the tour? A . The National Gallery. B . The Science Museum. C . Victoria and Alber在长期堆放煤的地方，地面和墙角都会染上一层黑色，用力刮去一层墙的表皮，可以看到里面还有黑色，这说明    ；夏天，雨后天晴，池塘里荷叶上的水珠随荷叶拂动而滚动不止，当两滴滚动的水珠相遇时，会汇合变成一滴较大的水滴，这说明分子间存在相互作用的    ．