关于电话的几种叙述中正确的是( ) A.话筒的作用是把声音直接传到对方的听筒 B

题型:选择题

问题:

关于电话的几种叙述中正确的是(  )

A.话筒的作用是把声音直接传到对方的听筒

B.话筒的作用是把电流变为声音

C.当听筒的螺线管里的电流大小变化时,听筒内振动膜(薄铁片)振动起来发出声

D.听筒和话筒里都有碳粒,其作用是保护振动膜

考点:电磁感应现象
题型:选择题

一只小鸟在平静的湖面上飞过,当小鸟距水面3m时,小鸟在湖面的“倒影”是_________ (填“实”或“虚”)像,它是由于光的________形成的,该“倒影”距小鸟__________m。

题型:选择题

阅读下面的唐诗,完成后面的问题。(8分)

夜泊牛渚怀古

李白

牛渚西江夜,青天无片云。登舟望秋月,空忆谢 * * 。

余亦能高咏,斯人不可闻。明朝挂帆席,枫叶落纷纷。

(注)谢 * * :东晋谢尚,官镇西 * * 。镇守牛渚时曾于秋夜泛舟赏月,遇袁宏诵诗,听后大为赞赏,邀袁宏过船长谈达旦,从此袁宏名声大著。

(1)有人认为此诗全靠一个“空”字将写景和抒情联系在一起。请以诗的前两联为例,对此作简要分析。(4分)

答:

(2)这首诗表达了作者怎样的复杂情感?(4分)\

答:

题型:选择题

Stephen William Hawking was born on January 8th, 1942 in Oxford, England. His parents’ house was in North London, but during the Second World War Oxford was considered a safer place to have babies. When he was eight, his family moved to St Albans. At eleven Stephen went to St. Albans School, and then on to University College, Oxford, his father’s old college. Stephen wanted to do math, although his father would have preferred medicine. Math was not available at University College, so he did physics instead. 

Stephen then went on to Cambridge to do research in Cosmology (宇宙论). After gaining his Ph.D. (哲学博士)he became first a Research Fellow, and later on a Professorial Fellow at Gonville and Caius College. After leaving the Institute of Astronomy in 1973, Stephen came to the Department of Applied Math and Theoretical Physics (理论物理), and since 1979 has held the post of Lucasian Professor of math.

Stephen Hawking has worked on the basic laws which rule the universe. With Roger Penrose he showed that Einstein’s General Theory of Relativity implied space and time would have a beginning in the Big Bang and an end in black holes. These results show it was necessary to unify(统一)General Relativity with Quantum Theory (量子论). One result of such a unification that he discovered was that black holes should not be completely black, but should give off radiation and disappear in the end.

59. Which of the following is NOT suitable for describing Stephen Hawking?

A. He once studied at the same college that his father studied at.

B. At one time he did research in Cosmology in Oxford. 

C. He preferred math to medicine at college.

D. He contributed to the unification of General Theory of Relativity and Quantum Theory.

60. The underlined word “available” in the first paragraph probably means “________”.

A. able to be had              B. allowed to study   

C. easy to understand           D. limited to learn

61. Why did Stephen Hawking’s parents move to Oxford from North London?

A. Because they liked it better than North London.

B. Because there was a world-famous university there.

C. Because they were tired of living in North London.

D. Because it was safer to give birth to a baby in Oxford.

62. Which of the following would be the best title for the passage?

A. Einstein and Stephen Hawking

B. Big Bang, a great theory 

C. Stephen Hawking, a great British scientist

D. The unification of two theories

题型:选择题

关于骨骼摄影条件的选择,错误的是

A.尽可能使用小焦点

B.管电压超过60kVp时,应使用滤线栅

C.胶片尺寸不宜过小,应包括软组织

D.远端四肢关节摄影可采用乳腺摄影用片

E.急性骨髓炎应增加摄影条件

题型:选择题

以下不是属于社会变迁的理论的是( )。

A.历史循环论

B.社会进化论

C.冲突理论

D.社会均衡论

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