创立元素周期表的科学家是( )。

【名词&注释】

诺贝尔化学奖(nobel prize in chemistry)、直接影响(directly affect)、哥本哈根学派(copenhagen school)、黄金时代(golden age)、波义耳定律(boyle ' s law)、经典音乐(classic music)、辉煌成就(brilliant achievements)、主人翁精神(sense of being master)、每一个学生、顺利完成(successful accomplishment)

[单选题]创立元素周期表的科学家是( )。

A. 门捷列夫
B. 波义耳
C. 居里夫人
D. 波尔

查看答案&解析 查看所有试题

学习资料：

[单选题]学校产生于( )。

A. 原始社会时期
B. 奴隶社会时期
C. 封建社会时期
D. 资本主义社会时期

[单选题]"一个小丑进城，胜过一打医生"，这说明情绪具有( )。

A. 信号功能
B. 健康功能
C. 激励功能
D. 调控功能

[单选题]人在心理活动和行为中表现出的稳定的动力特点是( )。

A. 人格
B. 性格
C. 能力
D. 气质

[多选题]班级管理的实质是让每个学生成为班级的主人。( )

A. √

[单选题] A decade ago, the idea that the planet was warming up as a result of human activity was largely theoretical. We knew that since the Industrial Revolution began in the 18th century, factories and power plants and automobiles and farms have been loading the atmosphere with heat-trapping gases, including carbon dioxide and methane (甲烷). But evidence that the climate was actually getting hotter was still murky. Not anymore. As an.authoritative report issued a few weeks ago by the United Nations-sponsored Intergovemmental Panel on Climate Change makes plain, the trend toward a warmer world has unquestionably begun. Worldwide temperatures have climbed more than 0.5℃ over the past century, and the 1990s were the hottest decade on record. After analyzing data going back at least two decades on everything from air and ocean temperatures to the spread and retreat of wildlife, the IPCC asserts that this slow but steady warming has had an impact on no fewer than 420 physical processes and animals and plant species in all countries. Glaciers, including the legendary snows of Kilimanjaro, are disappearing from mountaintops around the globe. Coral reefs are dying off as the seas get too warm for comfort. Drought is the norm in parts of Asian and Africa. El Nino (厄尔尼诺) events, which trigger devastating weather in the eastern Pacific, are more frequent. The Arctic permafrost (永久冻土带) is starting to melt. Lakes and rivers in colder climates are freezing later and thawing earlier each year. Plants and animals are shifting their ranges pole-ward and to higher altitudes, and migration patterns for animals as diverse as polar bears, butterflies and beluga whales are being disrupted.

Temperatures all over the world ________.

A. rose 5℃ in the 1990s
B. were the highest in 1990s
C. are recorded on file to researcb global warming
D. either increase or decrease depending on the location

[单选题]请阅读 Passage 2,完成1~5小题。 　　Passage 2 　　Taylor Swift,the seven-time Grammy winner,is known for her articulate lyrics,so there was nothing surprising about her writing a long column for The Wall Street Journal about the future of the music industry.Yet there's reason to doubt the optimism of what she had to say. 　　"This moment in music is so exciting because the creative avenues an artist can explore are limitless," Swift wrote."In this moment in musiC.stepping out of your comfort zone is rewardeD.and sonic evolution is not only accepted ...it is celebrated.The only real risk is being too afraid to take a risk at all." 　　That's hard to reconcile with Nielsen's mid-year U.S.music report,which showed a 15 percent year-on-year drop in album sales and a 13 percent decline in digital track sales.This could be the 2013 story all over again,in which streaming services cannibalize their growth from digital downloads,whose numbers dropped for the first time ever last year,except that even including streams,album sales are down 3.3 percent so far in 2014.Streaming has grown even more than it did last year,42 percent compared to 32 percent,but has failed to make up for a general loss of interest in music. 　　Consider this: in 2014 to date,Americans purchased 593.6 million digital tracks and heard 70.3 million video and audio streams for a sum total of 663.9 million.In the comparable period of 2013,the total came to 731.7 million. 　　Swift,one ofthe few artists able to pull off stadium tours,believes it's all about quality."People are still buying albums,but now they're buying just a few of them," she wrote."They are buying only the ones that hit them like an arrow through the heart." 　　In 2000,album sales peaked at 785 million.Last year,they were down to 415.3 million.Swift is right,but for many of the artists whose albums pierce hearts like arrows,it's too late.sales of vinyl albums have increased 40.4 percent so far this year,according to Nielsen,and the top-selling one was guitar hero Jack White's Lazaretto.The top 10 also includes records by the aging or deaD.such as the Beatles and Bob Marley & the Wailers.More modern entries are not exactly teen sensations,either: the Black Keys,Beck and the Arctic Monkeys.None of these artists is present on the digital sales charts,including or excluding streams.The top-selling album so far this year,by a huge margin,is the saccharine soundtrack to the Disney animated hit,"Frozen" . 　　When,like me,you're over 40 and you believe the music industry has been in decline since in 1993 (the year Nirvana released in Utero),it's easy to criticize the music taste of "the kids these days" ,a term even the 23-year old Swift uses.My fellow dinosaurs will understand if they compare 1993's top albums to Nielsen's 2014 list.But these kids don't just like to listen to different music than we do,they no longer find much worth hearing. 　　The way the music industry works now may have something to do with that.In the old 　　days,musicians showed their work to industry executives,the way most book authors still do to publishers (although that tradition,too,is eroding).The executives made mistakes and were credited with brilliant finds.Sometimes they followed the public taste,and sometimes they strove to shape it,taking big financial and career risks in the process.These days,according to Swift,it's all about the social networks."A friend of mine,who is an actress,told me that when the casting for her recent movie came down to two actresses,the casting director chose the actress with more Twitter followers," Swift wrote."In the future,artists will get record deals because they have fans-not the other way around." 　　The social networks are fickle and self-consciously sarcastic (see the recent potato salad phenomenon).They are not about arrow-through-the-heart sincerity.That's why YouTube made Psy a star,but it couldn't have been the medium for Beatle maniA.Justin Timberlake has 32.9 million Twitter followers,but he's no Jack White. 　　In the music industry's heyday,it produced a lot of schlock.But it got great music out to the masses,too.These days,it expects artists to do their own promotion and for those who less good at that than at making musiC.it may mean not getting heard.For fans it means less good music to stream and downloaD.Well,there's always the warm and fuzzy world of vinyl nostalgiA.I guess.

Which of the following is closest in meaning to the underlined word "heyday" in the Last PAraGraPH?

A. Bad moment.
B. Golden time.
C. Rush hour.
D. Lucky day.

本文链接：https://www.51bdks.net/show/8rx48r.html