《大国崛起》解说词写道：“17世纪，英国在历史性的转变中抢占了先机，已经率先到达了现代文明的入口，在下面两个世纪里，它将傲视全球。”英国“抢占先机”和“傲视全球”的典型表现分别是(     )

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    July is coming. People all around the world are talking about their ____ (vacation). Parents would like ____ (help) their children relax. ____ (luck), they have two months off. Some people enjoy quiet life, so many of ____ (they) stay at home watching TV, using computers and so on. ____ some spend time differently. My pen pal Tony ____ blonde hair is a boy from the US. He says that ____ (America) like going to the countryside. Just like his big family, they often go to a farm. There, some can feed animals, some can play and ____ (other) can watch ____ nice sky and rivers. They can also taste delicious food. They are quite ____  (interest) in the life there.

– 你会做什么？ - 我会画画。

-What ____ you ____? – I can draw.

①将乙醇和乙酸、稀硫酸共热制乙酸乙酯

②无水乙醇和浓硫酸共热到140℃制乙烯

③验证RX是氯代烷，把RX与烧碱水溶液混合加热后，将溶液冷却后再加入硝酸银溶液出现褐色沉淀

④做还原性实验时，当加入新制的氢氧化铜悬浊液后，未出现红色沉淀⑤检验淀粉已经水解，将淀粉与少量稀硫酸加热一段时间后，加入银氨溶被水浴加热后未析出银镜

⑤检验淀粉已经水解，将淀粉与少量稀硫酸加热一段时间后，加入银氨溶液水浴加热后未析出银镜

​李清照的这首《夏日绝句》诗表达了什么观点？