计算机等级考试:计算机代码(三)

文章作者 100test 发表时间 2007:04:30 08:25:42
来源 100Test.Com百考试题网


计算机等级考试训练软件《百宝箱》

NOTES
[1] 短语by far修饰比较级与最高级,强调数量、程度等,意为“……得多,最……”,这是一个用and 连接的并列句。
[2] to make sure是不定式短语作目的状语,其后的that引导的是make的宾语从句。
KEYWORDS
Binary Coded Decimal(BCD) 二进制编码的十进制,二-十进制
ASCII 美国信息交换用标准代码
EBCDIC 扩展的二-十进制交换码
even-parity 偶检验
odd-parity 奇检验
parity checking 奇偶检验

EXERCISES
1.True/False.
(1)______ The possible symbols in the binary numbering system are 0 to 9.
(2)______The decimal value of 16 is represented in 4 bit BCD as 00010101.
(3)______Alphanumeric versions of BCD commonly use 7,or 8 bits to represent characters.
(4)______ A 6 bit alphanumeric code can represent 128 different characters.
(5)______There are four 8 bit codes in current use.
(6)______ Each 8 bit unit used to code data is called a byte.
(7)______ Eight bit codes are limited to representing 128 different characters.
(8)______ An extra check(or parity)bit is often added to each 7,or 8 bit character represented in storage so that it will be possible to detect coding errors that may occur.
(9)______ The digits that can be found in the binary numbering system are only 0s and 1s.
(10______ Using BCD we can convert the entire decimal value into a pure binary form.
2.Fill in the blanks with appropriate words or phrases found behind this exercise.
(1)Every computer stores numbers,letters and characters in a ______ form.
(2)The abbreviation BCB is derived from its full name______.
(3)Using BCD we can convert each decimal number into its binary______.
(4)In addition to four numeric place positions in an 8-bit code there are another four
______positions.
(5)The most popular code used to represent data internally in personal computer is ______.
(6)The main difference between EBCDIC and ASCII-8 is______ positions.
(7)Parity checking has two types,they are ______.
(8)Any character can be represented by using just______of 0 and 1.
a.equivalent
b.even-parity and odd-parity
c.ASCII
d.coded
e.two digits
f.patterns of zone
g.zone bit
h.binary coded decimal

1.(1)f (2)f (3)t (4)f(5)f (6)t (7)f (8)t(9)t (10)f

2.(1)d (2)h (3)a (4)g(5)c (6)f (7)b (8)e



相关文章


计算机英语词汇:硬件基础
综合辅导:文件类型大全H
计算机英语词汇:数字电路
使用高级条件筛选Excel表中的数据
计算机等级考试:计算机代码(三)
Word文档批注的插入、修改与删除方法[1]
Word文档批注的插入、修改与删除方法[2]
全国计算机等级考试三级数据库考点分析之操作系统[3]
全国计算机等级考试三级数据库考点分析之操作系统[4]
澳大利亚华人论坛
考好网
日本华人论坛
华人移民留学论坛
英国华人论坛