分别完全燃烧1molC₂H₆、C₂H₄、C₂H₂、C₂H₆O，需要氧气最多的是（   ）

Just five minutes' exercise a day could make a difference your health.

下列各句中，句式与例句相同的一项是（   ）

例句：为仲卿母所遣

请对下面这段新闻报道的文字进行压缩。要求保留关键信息，句子简洁流畅，不超过50个字。

年度流行语是一个以年为跨度的社会观察哨。换上历史的广角镜头，流行语的变迁展现出时代的变与不变。以科学技术领域为例，从几年前的“互联网+”“引力波”，到时下的“5G”“区块链”，日新月异的革新不断拓展着生产生活的疆域。从“两弹一星”“陈氏定理”，到“神舟飞船”“港珠澳大桥”，中国科技的历史性跨越，成为中华人民共和国70年辉煌历程的生动注脚。流行语持续更新，归根结底是因为时代在变化、国家在发展。在这一过程中，无论是“铁人精神”还是“蛮拼的”态度，无论是“个体户”首吃螃蟹还是“创客”掀起创业热潮，拼搏奋斗的精神始终不变，人们对美好生活的追求始终不变，这些都将汇聚起推动中国向好发展的磅礡力量。

Usually John would be late for meetings. But this time, much to my surprise, he (arrive) on time.

根据 的微粒结构示意图，下列说法中错误的是（   ）

The ________result of the mid­term exam made his parents ________.

—You've got your flat furnished, haven't you?

—Yes, I ______ some used furniture and it was a real bargain.

I can't stand ______with Jane in the same office. She just refuses ________talking while she works.

警察逮住了小偷并将他关进了监狱。(in prison)

有① O、 O、 O②H₂、D₂、T₂③石墨、金刚石  ④ H、 H、 H四组微粒或物质．回答下列问题：

在容积为2L的密闭容器中进行如下反应：A（g）+2B（g）⇌3C（g）+nD（g），开始时A为4mol，B为6mol，5  min末时测得C的物质的量为3mol，用D表示的化学反应速率v（D）为0.2mol•L^﹣1•min^﹣1 ．

计算：

在①¹⁷₈O、¹②¹⁸₈O、③²³₁₁Na、④²⁴₁₂Mg、⑤¹⁴₆C、⑥¹⁴₇N中：

已知还原性：SO₃^2﹣＞I^﹣ ． 向含有amolKI和amolK₂SO₃的混合液中通入bmolCl₂充分反应（不考虑Cl₂与I₂之间的反应）．下列说法不正确的是（　　）

_______ you don't like him is none of my business.

在标况下，下列各组气体混合其平均相对分子量可达到40的是（   ）

阅读理解

    Think about the different ways that people use wind. You can use it to fly a kite or to sail a boat. Wind is one of our cleanest and richest power sources, as well as one of the oldest. Evidence shows that windmills(风车) began to be used in ancient Iran back in the seventh century AD. They were first introduced to Europe during the 1100s, when armies returned from the Middle East with knowledge of using wind power.

    For many centuries, people used windmills to grind(磨碎) wheat into flour or pump water from deep underground. When electricity was discovered in the late 1800s, people living in remote(偏僻的) areas began to use windmills to produce electricity. This allowed them to have electric lights and radio. However, by the 1940s when electricity was available to people in almost all the areas of the United States, windmills were rarely used.

    During the 1970s, people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity. People also realized that the supply of coal and gas would not last forever. Then, wind was rediscovered, though it means high costs. Today, there is a global movement to supply more and more of our electricity through the use of wind.

阅读理解

    If you see a group of people dancing and singing on the street or in the railway station,  you don't need to feel surprised．They are a flash mob （快闪族）, which is a group of people who come together suddenly in a public place, do something unusual for a brief period of time,  and then quickly break up．They are usually organized with the help of the Internet or other digital communication network．At a predetermined time, they gather and perform some  distractions（消遣） such as waving their hands and exchanging books, Then, they quickly break up before the police can arrive．Using mobile phones, the flash mob can change its location if the first one has been replaced for any reason．

    Bill Lasik, senior editor of Harper's Magazine, organized the first flash mob in Manhattan in May 2003 and the first successful flash mob came together on June 3, 2003 - after the first try was foiled at Macy's department store．Lasik claimed that the activity was designed to make fun of hipsters （起时髦的人）, and call attention to the cultural atmosphere．

    Flash mob gatherings can sometimes shock people．Such an activity might seem amusing and untrue, but it also might frighten people who are not aware of what is taking place．Undoubtedly, flash mobs can serve as good political tools in any direction．They also have great economic potential, such as using flash mobs to advertise a product．

    The flash mob is now becoming more and more popular．People use it to do many things．For example, in 2009, Michael Jackson's fans took part in a flash mob to remember him．Hundreds of his fans gathered singing and dancing Michael's famous song "Beat It" together．Flash mobs give people from all walks of life an opportunity to come together to create a memory．

阅读下面这首宋诗，完成下面小题。

次韵和甫咏雪

王安石

奔走风云四面来，坐看山垄玉崔嵬。

平治险秽非无德，润泽焦枯是有才。

势合便疑包地尽，功成终欲放春回。

寒乡不念丰年瑞，只忆青天万里开。

（注）①此诗写于新法推行之时。②和甫：王安石之弟王安礼，字和甫。

The (science) are in search of a new element.