问题 填空题

2008年北京奥运会,比赛实况要进行全球转播,则少需要______颗地球同步卫星,目前可以采用的上网方式有MODEM拨号、ISDN、ADSL和光纤宽带等上网,其中速度最快的是______.新浪、网易、雅虎是非常知名的网站,其中新浪的网址www.sina.com.cn 其中的“cn”表示这个网站是在______注册的.

答案

由于赤道的角度为360度,而一颗卫星能覆盖120度,故要有3颗,才能全部覆盖地球表面,全球卫星定位系统就是卫星通信的利用.

速度最快的是LAN宽带上网,基本做到千兆到小区、百兆到居民大楼、十兆到用户.

新浪的网址www.sina.com.cn 中其中的“cn”表示这个服务器是在中国注册的.

故答案:3;光纤宽带;中国

单项选择题 A1/A2型题
单项选择题

Florence Nightingale is most remembered as a pioneer of nursing and a reformer of hospital sanitation methods. For most of her ninety years, Nightingale pushed for reform of the British military health-care system and with that the profession of nursing started to gain the respect it deserved. Unknown to many, however, was her use of new techniques, of statistical analysis, such as during the Crimean War when she plotted the incidence of preventable deaths in the military. She developed a method to prevent the needless deaths caused by unsanitary conditions and the need for reform. With her analysis, Florence Nightingale revolutionized the idea that social phenomena could be objectively measured and subjected to mathematical analysis. She was an innovator in the collection, interpretation, and display of statistics.

Florence Nightingale’s two greatest life achievements-pioneering of nursing and the reform of hospitals-were amazing considering that most Victorian women of her age group did not attend universities or pursue professional careers. It was her father, William Nightingale, who believed women, especially his children, should get an education. So Nightingale and her sister learned Italian, Latin, Greek, history, and mathematics. She in particular received excellent early preparation in mathematics.

During Nightingale’s time at Scutari, she collected data and systematized record-keeping practices. Nightingale was able to use the data as a tool for improving city and military hospitals. Nightingale’s calculations of the death rate showed that with an improvement of sanitary methods, deaths would decrease. In February, 1855, the death rate at the hospital was 42.7 percent of the cases treated. When Nightingale’s sanitary reform was implemented, the death rate declined. Nightingale took her statistical data and represented them graphically.

As Nightingale demonstrated, statistics provided an organized way of learning and lead to improvements in medical and surgical practices. She also developed a Model Hospital Statistical Form for hospitals to collect and generate consistent data and statistics. She became a Fellow of the Royal Statistical Society in 1858 and an honorary member of the American Statistical Association in 1874. Karl Pearson acknowledged Nightingale as a "prophetess" in the development of applied statistics.

What does the author try to prove in this passage()

A.Women can be as successful as men

B. Education plays a vital role in one’s success

C. Mathematics could be used to improve medical practices

D. A career in medical field is also available for women