由公安机关所属的指挥中心(或办公室)及各业务职能部门组成的信息网络是( )A．纵向

两圆的半径分别为3cm和5cm，圆心距为7cm，则两圆的位置关系为（  ）

A．外离

B．相交

C．内切

D．外切

填补下列名句的空缺处或按要求填空。

小题1:我寄愁与明月，____________________________。

小题2:____________________________，水村山郭酒旗风。

小题3:不畏浮云庶望眼，____________________________。

小题4:有时朝发白帝，暮到江陵，其间千二百里，____________________________，不以疾也。

小题5:“____________________________，____________________________”这是曹操《观沧海》一诗中写岛上树木繁茂，百草丰美，给人生意盎然之感的句子。

小题6:站在中国馆最顶层的平台上，我真的感觉到了那种“_____________________，____________________________”的豪迈，世博园全貌，最佳城市体验区、企业馆、世博轴等，一一尽收眼底。（用杜甫《望岳》中的句子回答）

The invention of the electric telegraph gave birth to the communications industry. Although Samuel B. Morse succeeded in making the invention useful in 1837, it was not until 1843 that the first important telegraph line was constructed. By 1860 more than 50,000 miles of lines connected people east of the Rockies. The following year, San Francisco was added to the network.

The national telegraph network strengthened the ties between East and West and contributed to the rapid expansion of the railroads by providing an efficient means to monitor schedules and routes. Furthermore, the extension of the telegraph, combined with the invention of the steam-driven rotary printing press by Richard

M. Hoe in 1846, revolutionized the world of journalism. Where the business of news gathering had been dependent upon the mail and on hand-operated presses, the telegraph expanded the amount of information a newspaper could supply and allowed for more timely reporting. The creating of the Associated Press as a central wire service in 1846 marked the arrival of a new era (纪元) in journalism.

71. The main topic of the passage is        .

A. the history of journalism                                B. the origin of the national telegraph

C. how the telegraph network contributed to the expansion of railroads

D. the contributions and development of the telegraph network

72. The word "gathering" in line 11 refers to        .

A. people                    B. information                   

C. objects                                     D. substances

73. The author's main purpose in this passage is to         .

A. compare the invention of the telegraph with the invention of the steam-driven rotary press

B. propose new ways to develop the communications industry

C. show how the electric telegraph affected the communications industry

D. criticize Samuel B. Morse

74. This passage would most likely be found in a        .

A. U.S. history book   B. book on trains  

C. science textbook D. computer magazine

75. It can be inferred from the passage that          .

A. Samuel Morse did not make a significant contribution to the communications industry

B. Morse's invention did not immediately achieve its full potential (潜力)

C. the extension of the telegraph was more important than its invention

D. journalists have the Associated Press to thank for the birth of the communications industry

在我国白喉已属少见病。今年计划免疫调查中发现某些省市仍有地区性流行，并且发病年龄推迟，成人发病明显增多。

为预防本病的扩散应采取以下哪项措施（）

A.管理传染源，隔离治疗病人

B.密切接触者，隔离观察7天，带菌者，用抗生素治疗7天

C.病人的鼻咽分泌物及所用物品应进行消毒

D.保护易感人群，按计划免疫程度注射疫苗

E.以上全对

宏观调控主要运用市场和行政手段。( )