通过活动让学生思考:回答问题。对学生的不同回答,只要合理,就给以认可。设计意图:让学生学会有条理的表述自己的思考过程,理解三种数据都是刻画了一组数据的平均水平。整个授课的过程中,由于问题的难点进行了分解突破,问题的解决水到渠成。同时要学生意识到:学会用数据说话,科学地分析身边的事例。5.归纳小结,巩固提高。(1)列表对比平均数众数中位数概念注意点(2)在生活中可用平均数、众数和中位数这三个特征数来描述一组数据的集中趋势,它们各有不同的侧重点,需联系实际进行选择,对于同一份材料,同一组数据,不同的目的,应选择不同的数据代表。因从不同的角度进行分析时,看到的结果可能是截然不同的。作为信息的接受者,分析数据应该从多角度对统计数据作出较全面的分析,从而避免机械的,片面的解释。
31.阅读下列材料,回答问题。材料一 农,天下之大本也,民所恃以生也。而民或不务本而事末,故生不遂。——汉文帝材料二 世儒不察,以工商为末。妄议抑之。夫工商圣王之所欲来,商又使其愿出于途者,盖皆本也。——黄宗羲(1)材料一反映了中国古代哪一重要思想?据此,西汉统治者采取了哪些措施?(2)材料二中黄宗羲提出了什么主张?应如何评价这一主张?
(1)材料一中,谁曾经走过古丝绸之路?材料二 海上丝绸之路把丝绸远销海外,还把中国古代的发明创造,如(四大发明) 、 、 、印刷术、瓷器、医学、中草药等传布到世界各地。——陈炎《海上丝绸之路与中外文化交流》(2)请将材料二中三处画“_______” 的部分在答题卡上补充完整。材料三 明朝中期,随着日本国内社会动荡加剧,特别是由于明朝国力减弱,海防松懈,倭寇与中国海盗奸商等相互勾结,对中国沿海的武装抢劫日益猖獗。……沿海各地遭到重大破坏,时称“倭患”。——中国历史七年级下册 (3)根据材料三和所学知识,分析明朝中期出现“倭患”的原因是什么?倭寇猖獗之时,谁临危受命南下抗倭?(4)1684年,为了加强对东南地区的管辖,清政府在台湾设置了什么机构?
19.中国古代一直实行和平开放的对外政策。但是,从明朝中期开始,对外环境发生了变化。阅读下列材料回答问题。材料一 (见下图两个人物) (1)材料一中,谁曾经走过古丝绸之路?材料二 海上丝绸之路把丝绸远销海外,还把中国古代的发明创造,如(四大发明) 、 、 、印刷术、瓷器、医学、中草药等传布到世界各地。——陈炎《海上丝绸之路与中外文化交流》(2)请将材料二中三处画“_______” 的部分在答题卡上补充完整。材料三 明朝中期,随着日本国内社会动荡加剧,特别是由于明朝国力减弱,海防松懈,倭寇与中国海盗奸商等相互勾结,对中国沿海的武装抢劫日益猖獗。……沿海各地遭到重大破坏,时称“倭患”。——中国历史七年级下册 (3)根据材料三和所学知识,分析明朝中期出现“倭患”的原因是什么?倭寇猖獗之时,谁临危受命南下抗倭?
Choose the best choice fromA to F to finish the dialogue. You have one more answer. Each choice should beused only once.A: Hello, I’m a schoolnewspaper reporter. May I ask you some questions?B: ____46____
B: It’s about theexperiments three astronauts are doing on the space station.A: That’s great. I’minterested in space, so I want to be an astronaut like them.
On a snowy day, there was a man walking in ahurry on the road. His clothes were in poor condition. You might think he was abeggar(乞丐),but in fact he was a painter. His name was Vincent Willem van Gogh.
I often use old clothes that people don’t wearany more to make bags. I opened a small shop in my community and set up awebsite to sell the bags online. Many customers think they are fantastic. Now Iplan to write a new book about ways to use old clothes.
Remember that it’s better to fail than it’s togive up, and the key is to learn from your failure(失败). But along withdifficulties, there will also be ____18____ wonderful waiting for you.
Michelle,a famous lady, has found that more than 25% students are too fat in hercountry. It is a very serious problem. So she starts a Health Program to dealwith it. The Health Program is to reduce the number of fat students today andin the future.
Theoil paper umbrella is a traditional Chinese handicraft(手工艺品).It has a history of over 1,000 years in China.In early TangDynasty, it was introduced to Japan and Korea, so it was called the “TangUmbrella”. Later oil paper umbrellas were spread to other Asian countries, suchas Vietnam, Thailand and Laos, and each had its own style. However, assteel-ribbed(钢骨的)umbrellas appeared in the last century, thehand-made oil paper umbrellas became less used in daily life. They were turnedinto decorative artifacts(装饰性工艺品).
Bike-to-Work Day is held every year across North America on thethird Friday of May. It was started by the League of American Bicyclistsin 1956. Its aim is to promote (促进) the bicycle as a serious choice of getting toand from work. In today’s world where global warming is a serious issue, thebicycle is a perfect way of reducing our carbon (碳) footprint.
Bike-to-Work Day is held every year across NorthAmerica on the third Friday of May. It was started by the League ofAmerican Bicyclists in 1956. Its aim is to promote (促进) the bicycle as a seriouschoice of getting to and from work. In today’s world where global warming is aserious issue, the bicycle is a perfect way of reducing our carbon (碳) footprint.
Dealing with a nosebleed(鼻出血)mightseem simple. But recently, the British RED Cross asked parents with youngchildren how to help a child with a nosebleed. About 65 percent of parents didnot ____11____ the correct action to help.
One night many yearsago, an angry voice woke me up from sleep. It was my drunken (喝醉的) father. Those days, he would always ___11___ home very late. Sometimes, he would also go on to fight with my mom.
FIFA World Cup is one of the biggest sportsevents in the world. It ___11___every 4 years. The first World Cup was in 1930. It has a history of over 90years. During the World Cup, ___12___fans watch the games and cheer for their favorite teams or players.
FIFA World Cup is one of the biggest sportsevents in the world. It ___11___ every 4 years. The first World Cup wasin 1930. It has a history of over 90 years. During the World Cup, ___12___fans watch the games and cheer for their favorite teams or players. We haveknown some famous football players from the football competitions, such asBeckham, Messi, and Figo. They have excited football fans for many years.
Dealing with a nosebleed(鼻出血)mightseem simple. But recently, the British RED Cross asked parents with youngchildren how to help a child with a nosebleed. About 65 percent of parents didnot ____11____the correct action to help.
My earliest memory ofthese events began when I was around four years old. I was filled with ___12___ at that time. There were lots of ___13___ — crying, shouting, and doors slamming (砰地关上).
The December day started like any other. Papacame back with his boat full of fish. Mama made breakfast for the family.Seven-year-old Joonas was doing his homework, while his two little brothers ranaround the yard. That day seemed peaceful, but Alejo ____16____ better.
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