题干

某次数学测验,抽取部分同学的成绩(得分为整数),整理制成如图直方图,根据图示信息描述不正确的是(  )

     

A:抽样的学生共50人

B:估计这次测试的及格率(60分为及格)在92%左右

C:估计优秀率(80分以上为优秀)在36%左右

D:60.5~70.5这一分数段的频数为12

上一题 下一题 0.0难度 选择题 更新时间:2019-11-22 07:47:45

答案(点此获取答案解析)

D

同类题2

Canada Day

                                                                  

                                                                                                                              

      Since 1982, July 1st has been officially known as Canada Day. Canadians of all ages take part in this festival across the country.
  Canada Day is the year's biggest national party. In many towns and cities, the government organizes a lot of events, often outdoors. These include parades(游行), concerts, festivals, firework displays and ceremonies for new Canadian citizens(公民). The celebrations often have a patriotic mood. Canada's national flag, a symbol for Canada Day, can be seen everywhere and a lot of people paint their faces red and white, which are Canada's national colors. The celebrations in Ottawa, Canada's capital city, are especially grand and exciting.
  In the province of Quebec, many home rentals(租赁)start on July 1st and last for exactly one year, and many people in Quebec spend Canada Day moving from one house to another. So in Quebec, Canada Day is also known as Moving Day.
  Many organizations, businesses and stores are closed this day. Only some bookstores, ho spitals and gas stations may be open. Post offices are closed, too. As Canada Day falls in the Canadian summer holiday period, all schools are closed as well. In some areas, special services are provided for large events. The concerts, parades and festivals may cause some traffic jams.

同类题4

阅读材料,完成下列要求。

材料一:无论是在中世纪、近代或现代英国,各阶层的人士,对议会和国王具有一种心理状态:一方面,人人心中逐渐形成了一个想法,那就是议会执掌无所不包的权力,这是合乎法律的且是必须的;另一方面,人们在一般正常情况下,对国王怀有一种敬重的心理……人们在心理上形成一种在国王统治下的安全感

——王宇博《君主立宪制:英国的历史选择》

材料二:法国之所以采用暴力革命来克服专制王权,原因就在于法国专制主义过于强大,王权与贵族坚决捍卫旧制度,不愿做出任何妥协,对立双方只好兵戎相见。然而,大革命并没有解决根本问题,此后近百年中,法国一直处于革命与复辟的轮回中,社会持续动荡,经济发展速度受到影响,工业化进程缓慢。直到1870年后,法国模式突然发生转折,由对抗转为妥协。此后没再发生大规模的革命,法国人开始用协商手段逐步建立起民主制度。

——选自钱乘旦《各国现代化模式的比较》

材料三:第五条:帝国立法权由联邦议会和帝国议会行使之。

第十二条:联邦议会与帝国议会的召集、开会、延会、闭会之权属于皇帝。

第十八:条皇帝委派官吏,命令他们宣誓效忠帝国,并在必要情况下,命令他们退职。

第六十三条:帝国的全部军事力量组成为统一的军队,在平时和战时受皇帝指挥。

——1871年《德意志帝国宪法》(节选)