关于x的方程Cx2-x16=C5x-516的解为______.

题型:填空题

问题:

关于x的方程
Cx2-x16
=
C5x-516
的解为______.
考点:排列与组合
题型:填空题

— Why do you want to go to the wetland?

— _____ the different kinds of birds living there.

[ ]

A. Keeping

B. To study

C. To keep

D. Study

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题型:填空题

Marie Curie was a Polish-born physicist and chemist and one of the most famous scientists of her time. Together with her husband Pierre, she won the Nobel Prize in 1903, and another one in 1911.

Marie Sklodowska was born in Warsaw on 7 November 1867, the daughter of a teacher. In 1891, she went to Paris to study physics and maths at the Sorbonne where she met Pierre Curie, professor of the School of Physics. They married in 1895.

The Curies worked together studying radioactivity(放射性), building on the work of the German physicist Roentgen and the French physicist Becquerel. In July 1898, the Curies announced the discovery of polonium(钋). At the end of the year, they announced the discovery of another, radium(镭). The Curies, along with Becquerel, won the Nobel Prize for Physics in 1903.

Pierre’s life was cut short in 1906 when he was knocked down and killed by a carriage. Marie took over his teaching post, becoming the first woman to teach at the Sorbonne, and devoted (献身于) herself to continuing the work that they had begun together. She received a second Nobel Prize, for Chemistry, in 1911.

The Curies’ research was important in developing X-rays in surgery. During World WarⅠ, Marie helped fixed X-ray equipment, which she herself drove to the front lines. She helped train doctors for the International Red Cross.

Although she achieved much success, men scientists in France were still against Marie, and she never received any financial help from her work. By the late 1920s her health was beginning to become worse. She died on 4 July 1934 from her dangerous research. The Curies’ eldest daughter Irene was a scientist and winner of the Nobel Prize for Chemistry.

小题1:All the following people contributed to Marie’s first Nobel Prize EXCEPT _____.

A.Irene

B.Pierre

C.Becquerel

D.Roentgen小题2:We can know from the text that Marie’s work______.

A.won her respect from men scientists

B.brought her some financial help

C.had a bad effect on her health

D.had no influence on her children小题3:Which is the right order of the following events?

①Marie became a teacher at the Sorbonne.

②Marie helped train doctors.

③The Curies discovered polonium.

④The Curies won the Nobel Prize for Physics.

⑤The Curies discovered radium.

A.①④⑤③②

B.③⑤④①②

C.⑤④①③②

D.②③⑤①④小题4:Which of the following about Marie is NOT true?

A.She married at the age of 28.

B.Her parent was a teacher.

C.She was the first woman teacher at the Sorbonne.

D.She helped the International Red Cross fix X-ray equipment.

题型:填空题

春秋战国时期思想家的下列言论中哪一项不利于新兴地主阶级的发展。

A.“道无为而无不为,侯王若能守之,万物将自化”

B.“农与工肆之人,有能则举之,高予之爵,重予之禄”

C.“民为贵,社稷次之,君为轻”

D.“事在四方,要在中央,圣人执要,四方来效”

题型:填空题

什么叫骨料?

题型:填空题

公锥是长锥形整体结构。可分为接头和()两部分。

A.尖端

B.引鞋

C.卡瓦

D.锥形螺纹

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