如图所示,在μ=0.2的粗糙水平面上,有一质量为10kg的物体以一定的速度向右运

题型:问答题

问题:

如图所示,在μ=0.2的粗糙水平面上,有一质量为10kg的物体以一定的速度向右运动,同时还有一水平向左的力F作用于物体上,其大小为10N,则物体受到的摩擦力的大小为______N,方向为______.(g取10m/s)

考点:滑动摩擦力、动摩擦因数
题型:问答题

缺铁性贫血治疗的目标为()。

A.自觉症状改善

B.红细胞数及Hb量恢复正常

C.红细胞形态恢复正常

D.血清铁恢复正常

E.血清铁蛋白恢复正常

题型:问答题

Jacqueline Bouvier Kennedy Onassis was one of the most private women in the world, yet when she went to work as an editor in the last two decades of her life, she revealed (展现) herself as she did nowhere else.

After the death of her second husband, Greek shipping magnate(巨头) Aristotie Onassis Jacqueline’s close friend and former White House secretary Letitia Baldrige made a suggestion that she consider a career in publishing. After consideration, Jacqueline accepted it. Perhaps she hoped to find there some ideas about how to live her own life .She became not less but more interested in reading. For the last 20 years of her life, Jacqueline worked as a publisher’s editor, first at Viking, then at Doubleday, pursuing(追求)a late-life career longer than her two marriages combined. During her time in publishing, she was responsible for managing and editing more than 100 successfully marketed books. Among the first books were In the Russian Style and Inventive Paris Clothes. She also succeeded in persuading TV hosts Bill Moyers and Joseph Campbell to transform their popular television conversations into a book ,The Power of Myth. The book went on to become an international best-seller. She dealt, too, with Michael Jackson as he prepared his autobiography(自传),Moonwalk.

Jaequeliner may have been hired for her name and for her social relations, but she soon proved her worth. Her choices, suggestions and widespread social relations were of benefit both to the publishing firms and to Jacqueline herself. In the books she selected for publication, she built on a lifetime of spending time by herself as a reader and left a record of the growth of her mind. Her books are the autobiography she never wrote. Her role as First lady, in the end, was overshadowed by her performance as an editor. However, few knew that she had achieved so much.

小题1:We can learn from the passage that Jacqueline ______.

A.became fond of reading after working as an editor

B.was in charge of publishing 100 books

C.promoted her books through social relations

D.gained a lot from her career as an editor小题2:The underlined sentence in the last paragraph probably means that ______.

A.Jacqueline ended up as an editor rather than as First Lady

B.Jacqueline’s life as First Lady was more colorful than as an editor

C.Jacqueline was more successful as an editor than as First Lady

D.Jacqueline’s role as First Lady was more brilliant than as an editor小题3:What can be inferred from the passage?

A.Jacqueline’s two marriages lasted more than 20 years

B.Jacqueline’s own publishing firm was set up eventually

C.Jacqueline’s views and beliefs were reflected in the books she edited

D.Jacqueline’s achievements were widely known小题4:The passage is mainly ______.

A.an introduction of Jacqueline’s life both as First Lady and as an editor.

B.a brief description of Jacqueline’s lifelong experiences.

C.a brief account of Jacqueline’s career as an editor in her last 20 years.

D.an analysis of Jacqueline’s social relations in publishing

题型:问答题

如图是A、B两种固体物质的溶解度曲线.请回答下列问题:

(1)P点的意义是                                

(2)将接近饱和的A物质的水溶液,变成饱和溶液的方法有            (答出一种即可).

(3)t2℃时,将30g A物质放入50g水中,充分搅拌,所得溶液的质量是           g.

题型:问答题

()是指导企业未来3~5年培训发展全局的计划和策略。

A.企业培训手册

B.企业培训课程体系

C.企业培训规划

D.企业培训计划

题型:问答题

诊断颅底骨折通常依据

A.头颅X线摄片

B.受伤机制

C.剧烈头痛伴呕吐

D.临床体征

E.意识障碍

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