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【简答题】
When we talk about getting online, we mean being connected to the Internet---a giant network of computers that connects people and information all over the world. The Internet has a lot in common with other forms of communication: Like the U.S. postal service, the Internet allows anyone who knows your Internet address to send you a letter. (It’s called electronic mail or e-mail for short.) Like the telephone, the Internet allows you to “chat” with other people by participating in online discussing groups. Like the library, the Internet contains information on almost any topic you can imagine in many formats, including books, articles, videos, and music recordings. Like the newspaper, the Internet can give you new information every day, including world news, business, sports, travel, entertainment, and ads. In addition to words, one part of the Internet---the World Wide Web (often shortened to WWW or Web)---is especially interesting to people because it includes pictures and sounds. The Internet began in the 1960s as a U.S. Department of Defense communication network. Soon after, university researchers and professors began to use it to communicate with others in their fields. Internet use really took off in the early 1990s with the arrival of the Web, which make it easier to find and view information online. Today, millions of people throughout the world are connected to the Internet. No one is in charge of the people throughout the world are connected to the Internet. No one is in charge of the Internet; it’s growing and its format and content is being changed by its users every day. A computer that is connected to the Internet allows your home, community center, local library, or school to turn to a place of unlimited information and communication. The Internet can help your family: Find educational resources, including up-to-the-minute news, copies of important documents and photos, and collections of research information on topics ranging from weather conditions to population statistics. Get help with homework through online encyclopedias and other reference materials and access to experts Increase reading skills by providing access to interesting materials and suggestions for additional reading. Improve technology and information skills necessary to find and use information, and meet a growing demand for these skills in the workplace. Connect with places around the world to exchange mails with electronic pen pals and to learn about other cultures and traditions.
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【简答题】下面选项中不属于地性线的是( )。 A山脊线 B山谷线 C山脚线 D等高线
【多选题】下面选项中不属于地性线的是( )
A.
山脊线
B.
山谷线
C.
分水线
D.
等高线
E.
示坡线
【单选题】Which poet belongs to the Active Romantic group?
A.
John Milton
B.
William Wordsworth
C.
Charles Lamb
D.
John Keats
【简答题】设有一个教学数据库,包括以下三个关系模式: 学生 S ( Sno, Sname, S, Sage, Sdept ) 课程 C ( Cno, Cname, Cpno, Ccredit ) 学习 SC ( Sno, Cno, Grade ) 学生关系模式属性分别对应学号、姓名、性别、年龄、所在院系 课程关系模式属性分别对应课程号、课程名、先行课、学分 学习关系模式分别对应学号、课程号、成绩 (1...
【简答题】设有关系模式:学生修课管理(学号,姓名,所在系,性别,课程号,课程名,学分,成绩)。设一名学生可以选修多门课程,一门课程可以被多名学生选修。一名学生有唯一的所在系,每门课程有唯一的课程名和学分。请指出此关系模式的候选键,判断此关系模式是第几范式的;若不是第三范式的,请将其规范化为第三范式关系模式,并指出分解后的每个关系模式的主键和外键。 2 .设有关系模式:学生表(学号,姓名,所在系,班号,班主任...
【单选题】下面选项中不属于地性线的是( )
A.
同脊线
B.
同谷线
C.
同脚线
D.
等高线
【判断题】谵妄是一种以兴奋性增高为主的高级神经中枢急性活动失调状态,属于意识障碍的特殊表现。
A.
正确
B.
错误
【单选题】以下哪一个是ITU的数字证书标准
A.
SSL
B.
SHTTP
C.
x、509
D.
SOCKS
【单选题】‬ 哪个选项是下面代码的执行结果? s = 'PYTHON' print ( "{0:3}" . format ( s ))
A.
PYT
B.
PYTHON
C.
PYTH
D.
PYTHON
【单选题】下面选项中不属于地性线的是
A.
山脊线
B.
山谷线
C.
山脚线
D.
等高线
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