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【单选题】
在 DO WHILE … ENDDO循环结构中 ,EXIT 命令的作用就是

退出过程 , 返回程序开始处
转移到 DO WHILE语句行 , 开始下一个判断与循环
终止循环 , 将控制转移到本循环结构 ENDDO后面的第一条语句继续执行
终止程序执行
【单选题】
下列关于for循环和while循环的说法中哪个是正确的?( )

while循环能实现的操作,for循环也都能实现
while循环判断条件一般是程序结果,for循环判断条件一般是非程序结果
两种循环任何时候都可替换
两种循环结构中都必须有循环体,循环体不能为空
【单选题】
For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never-ending flood of words. In getting a job or advancing in one, the ability to read and comprehend quickly can mean the difference between success and failure. Yet the unfortunate fact is that most of us are poor readers. Most of us develop poor reading habits at an early age, and never get over them. The main problem lies in language itself—words. Single words have little meaning until they are combined into phrases, sentences and paragraphs. Unfortunately, however, the untrained reader does not read groups of words. He reads one word at a time, often regressing to reread words or passages. Regression, or looking back over what you have just read, is a common bad habit in reading. Another habit which slows down the speed of reading is vocalization—sounding each word either orally or mentally as one reads. To overcome these bad habits, some reading clinics use a device called accelerator (加速器), which moves a bar down the page at a predetermined speed. The bar is set at a slightly faster rate than the reader finds comfortable, in order to “stretch” him. The accelerator forces the reader to read fast, making word-by-word reading, regression and vocalization virtually impossible. At first, comprehension is sacrificed for speed. But when you learn to read ideas, you will not only read faster, but your comprehension will improve. Many people have found their reading skills improved a lot after some training. Most people cant read and comprehend quickly mainly because __________.

they dont read groups of words
they dont realize they have poor reading habits
they dont like to be trained in reading skills
they dont understand words when put together
【单选题】
For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never-ending flood of words. In getting a job or advancing in one, the ability to read and comprehend quickly can mean the difference between success and failure. Yet the unfortunate fact is that most of us are poor readers. Most of us develop poor reading habits at an early age, and never get over them. The main problem lies in language itself—words. Single words have little meaning until they are combined into phrases, sentences and paragraphs. Unfortunately, however, the untrained reader does not read groups of words. He reads one word at a time, often regressing to reread words or passages. Regression, or looking back over what you have just read, is a common bad habit in reading. Another habit which slows down the speed of reading is vocalization—sounding each word either orally or mentally as one reads. To overcome these bad habits, some reading clinics use a device called accelerator (加速器), which moves a bar down the page at a predetermined speed. The bar is set at a slightly faster rate than the reader finds comfortable, in order to “stretch” him. The accelerator forces the reader to read fast, making word-by-word reading, regression and vocalization virtually impossible. At first, comprehension is sacrificed for speed. But when you learn to read ideas, you will not only read faster, but your comprehension will improve. Many people have found their reading skills improved a lot after some training. Most people can’t read and comprehend quickly mainly because __________.

they don’t read groups of words
they don’t realize they have poor reading habits
they don’t like to be trained in reading skills
they don’t understand words when put together
【单选题】
For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never-ending flood of words. In getting a job or advancing in one, the ability to read and comprehend quickly can mean the difference between success and failure. Yet the unfortunate fact is that most of us are poor readers. Most of us develop poor reading habits at an early age, and never get over them. The main problem lies in language itself—words. Single words have little meaning until they are combined into phrases, sentences and paragraphs. Unfortunately, however, the untrained reader does not read groups of words. He reads one word at a time, often regressing to reread words or passages. Regression, or looking back over what you have just read, is a common bad habit in reading. Another habit which slows down the speed of reading is vocalization—sounding each word either orally or mentally as one reads. To overcome these bad habits, some reading clinics use a device called accelerator (加速器), which moves a bar down the page at a predetermined speed. The bar is set at a slightly faster rate than the reader finds comfortable, in order to “stretch” him. The accelerator forces the reader to read fast, making word-by-word reading, regression and vocalization virtually impossible. At first, comprehension is sacrificed for speed. But when you learn to read ideas, you will not only read faster, but your comprehension will improve. Many people have found their reading skills improved a lot after some training. How does an accelerator help people to read?

It helps people read at a comfortable speed.
It makes people stretch their eyes when reading.
It forces people to overcome bad reading habits.
.It lets people look back over what they have just read
【单选题】
While being questioned on the court, the man denied ____ the old lady’s necklace.

having taken
taking
to have taken
to take
【单选题】
以下程序段. x=-1; do { x=x*x; } while (!x);

是死循环
循环执行两次
循环执行一次
有语法错误
【单选题】
以下程序段 x=-1; do {x=x*x;} while(!x);

是死循环
循环执行两次
循环执行一次
有语法错误
【单选题】
While being questioned on the court, the man denied _____the old lady’s necklace.

having taken
taking
to have taken
to take
【单选题】
While we admit his good points, we can see his bad ______.

ones
one
those
point