写出下面单词的中文意思：fileserver n.

A．disk  B．display  C．printer  D．memory

A．COBOL  B．Java  C．UML  D．Basic

A．end  B．break  C．stop  D．quit

Artificial Intelligence(1)a relatively young branch of science, new enough that we can still trace the development of the field from its inception in 1956 to the present. About six years ago, when we(2)planning the Handbook of Artificial Intelligence, we thought it would(3)possible to present AI comprehensively in three volumes. In retrospect, that seems to have(4)a good guess, although, inevitably, the outline(5)changed many times to reflect changes in the emphasis and methods of AL

供选择的答案：

(1)be  (2) am  (3) are  (4) is

(5) was  (6) were  (7) being  (8) been

(1) The language translator converts the symbolic program into source program.

(2) The coded program written by a programmer is called an object program.

(3) COBOL is self-documenting unlike many technical language.

(4) FORTRAN has high capabilities for performing input/output operations and in handling nonnumeric data.

(5) Loading is a process through which the information on the diskettes or tapes is read by the input unit and stored in the proper memory location.

(6) The assemble program executes source codes directly by determining the meaning of each statement as it is encounted.

(7) Magnetic tape uses cylinders for finding data.

(8) Hexadecimal is used as a shorthand for the internal codes.

(9) Another name of diskette is floppy disk.

(10) An IF-THEN-ELSE selection technique can never be part of a loop.

(11) The most popular language for scientific computing is FORTRAN.

(12) It is much easier to access data in a file than in a database.

Certificates are(1)documents attesting to the(2)of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to(3)someone else. In their simplest form, Certificates contain a public key and a name. As commonly used,a certificate also contains an(4)date, the name of the CA that issued the certificate,a serial number, and perhaps other information. Most importantly, it contains the digital(5)of the certificate issuer. The most widely accepted format for certificates is X.509, thus, Certificates can be read or written by any application complying with X.509.