题干

口袋里有相同的2个红球、4个白球和6个黑球,从口袋里摸出2个球,若两个都是红色,则甲胜;若两个都是黑球,则乙胜.谁获胜的概率大(         )

A:甲

B:乙

C:甲乙一样大

D:不能确定

上一题 下一题 0.0难度 选择题 更新时间:2019-11-25 10:10:34

答案(点此获取答案解析)

B

同类题2

阅读理解

    There is a lot to learn about the creations of Beatrix Potter—not only is she the author of one of the world's most famous children 's books, The Tale of Peter Rabbit ,but also a pioneering conservationist(自然资源保护论者) with the spirit of a scientist.

    “Potter grew up as the daughter of a wealthy Victorian family, but along with her brother who filled an entire floor of their large house in London with all sorts of animals, which contributed a lot to her works,” said Anne Lundin, a retired professor for the UW-Madison School of Library and Information Studies.

    “As an adult, she was a frustrated botanical scientist. That field was not open to her because she was female,” Lundin said. Potter was urged to turn the charming stories she wrote in letters to children into books. She wrote 23 books in all--a body of work that has inspired plays, ballets, films and an astonishing amount of merchandise.

    “The Tule of Peter Rabbit is probably the most famous children's book in the world, which was published in 1902 and has really stood the test of time. It's been translated into 36 languages. The parents and grandparents will share it with the next generation,” said Lundin.

    Potter also made a mark on the world through her land conservation.“In many ways, she was like Peter Rabbit, risking into a world of adventure. She withdrew from London as soon as she started making some money on her books to the Lake District and became an extremely important farmer and conservationist. She preserved and passed on 15 farms and over 4,000 acres, which were given back to the country as gifts in the 20th century,” said Lundin.

    Even though she was born 150 years ago, she was amazingly modern--her embracing of the natural world, commented Jennifer Blatchley Smith, an artistic director of the show Peter Rabbit Tales to celebrate the 150th anniversary of Potter's birth.

同类题3

阅读下列材料,回答问题。
材料一 “(太宗)谓使臣曰:国以民为本,人以食为命,若禾黍不登,则兆庶非国家所有。……今省徭赋,不夺其时,使比屋之人,谘其耕稼,此则富矣。”
                                                                                                                                                               ——引自《贞观政要》卷八
材料二  武周时期搜罗人才,尝十道使人,天下选残明经、进士,及下村教童蒙博士,皆被搜扬,不曾试练,并与美职。能够重视农业,规定州县境内,田畴垦辟,家有余粮,则予以升奖。社会经济持续发展,表现在户数增长上,从永昌(689年)时的三百八十万户 ,到她去世时增至六百一十五万余户。
                                                                                                                                                              ——出自《隋唐五代史纲》
材料三 “开元时,海内富实,米斗之价钱十三;娟一匹,钱二百;天下岁入之物,租钱二百余万缗(min),粟千九百八十余万户,庸调绢七百四十万匹,布千三十五万余端。
                                                                                                                                                            ——《新唐书》卷五一 
请回答:
(1)上述三则材料分别反映了谁在位时期的统治局面?
(2)结合所学历史知识指出这些局面的共同点?
(3)想一想这些局面的出现标志着我国封建社会处于什么时期?