Linux操作系统
Linux操作系统
下列那一个指令无法用来分页显示档案内容？（）
A:more B:less C:catfile D:more E:ps
下面哪个命令不能用来显示文本的内容（）。
A:more B:less C:find D:cat
下列那些指令可以用来分页显示档案内容？（）
A:head B:cat C:more D:less
用来显示文件内容的命令有（）。
A:cat B:more C:less D:head
在下列命令中，不能显示文本文件内容的命令是：（）.
A:more B:less C:tail D:join
? ?阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
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Highways in the US ? ?The United States is well-known for its network of major highways designed to help a driver get from one place to another in the shortest possible time.{{U}} ?(51) ?{{/U}}these wide modern roads are generally smooth and well maintained, with{{U}} ?(52) ?{{/U}}sharp curves and many straight sections, a direct route is not always the most{{U}} ?(53) ?{{/U}}one. Large highways often pass{{U}} ?(54) ?{{/U}} scenic areas and interesting small towns. Furthermore, these highways generally{{U}} ?(55) ?{{/U}}large urban centers which means that they become crowded with{{U}} ?(56) ?{{/U}}traffic during rush hours, when the "fast, direct" way becomes a very slow route. However, there is{{U}} ?(57) ?{{/U}}always an-other route to take if you are not in a hurry. Not far from the{{U}} ?(58) ?{{/U}}new "superhighways", there are often older,{{U}} ?(59) ?{{/U}}heavily traveled roads which go though the countryside.{{U}} ?(60) ?{{/U}} of these are good two lane roads; others are uneven roads{{U}} ?(61) ?{{/U}}through the country. These secondary routes may go up steep slopes along hilly{{U}} ?(62) ?{{/U}}or down frightening hillsides to towns{{U}} ?(63) ?{{/U}}in deep valleys. Though these are less direct routes, longer and slower, they generally go to places{{U}} ?(64) ?{{/U}}the air is clean and the scenery is beautiful, and the driver may have a chance to get a fresh, clean{{U}} ?(65) ?{{/U}}of the world. |
A:and B:less C:more D:or
? ?阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
| {{B}}? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ?Highways in the US{{/B}} ? ?The United States is well-known for its network of major highways designed to help a driver get from one place to another in the shortest possible time. {{U}}?(51) ?{{/U}} these wide modern roads are generally smooth and well maintained, with {{U}}?(52) ?{{/U}} sharp curves and many straight sections, a direct route is not always the most {{U}}?(53) ?{{/U}} one. Large highways often pass {{U}}?(54) ?{{/U}} scenic areas and interesting small towns. Furthermore, these highways generally {{U}}?(55) ?{{/U}} large urban centers which means that they become crowded with {{U}}?(56) ?{{/U}} traffic during rush hours, when the "fast, direct" way becomes a very slow route. However, there is {{U}}?(57) ?{{/U}} always another route to take if you are not in a hurry. Not far from the {{U}}?(58) ?{{/U}} new "superhighways", there are often older, {{U}}?(59) ?{{/U}} heavily traveled roads which go though the countryside. {{U}}?(60) ?{{/U}} of these are good two lane roads; others are uneven roads {{U}}?(61) ?{{/U}} through the country. These secondary routes may go up steep slopes along hilly {{U}}?(62) ?{{/U}} or down frightening hillsides to towns {{U}}?(63) ?{{/U}} in deep valleys. Though these are less direct routes, longer and slower, they generally go to places {{U}}?(64) ?{{/U}} the air is clean and the scenery is beautiful, and the driver may have a chance to get a fresh, clean {{U}}?(65) ?{{/U}} of the world. |
A:and B:less C:more D:or
? ?阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
| {{B}}? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? Eat for a Good
and Healthful Life{{/B}} ? ?Food{{U}} ?(1) ?{{/U}}us alive. It is our sustenance and our pleasure. But recently, research has shown that the eating habits of the average Americans may be dangerous to future health. ? ?The foods Americans now choose are oftentimes too{{U}} ?(2) ?{{/U}}in calories and fats, so this article reports a new study: Diet and Health, Implications for Reducing Chronic Disease Risk. ? ?The study, conducted{{U}} ?(3) ?{{/U}}the National Research Council’s Committee on Diet and Health,{{U}} ?(4) ?{{/U}}that balancing nutrition, calories and activity is key{{U}} ?(5) ?{{/U}}enjoying a long and healthful life. ? ?The report recommends that most Americans increase{{U}} ?(6) ?{{/U}}activity to a moderate level and make changes in food{{U}} ?(7) ?{{/U}}and calories intake to maintain ideal weight. Most of us-- even those of us at ideal weight--need to eat{{U}} ?(8) ?{{/U}}fat so that no more than 30% of our dally calories will come from fat. ? ?That means cutting{{U}} ?(9) ?{{/U}}on red meat and whole milk dairy products.{{U}} ?(10) ?{{/U}}, eat fish, chicken without skin, lean meats, and low-fat and no-fat dairy products. ? ?The report of the Committee on Diet and Health recommends we eat five or more 1/2-cup servings of vegetables and fruits{{U}} ?(11) ?{{/U}}-- especially green and yellow vegetables and citrus fruits. ? ?Eating more fruits and vegetables doesn’t have to mean increased calories intake. Many plant foods are nutrient-rich: they provide many vitamins and minerals for very few{{U}} ?(12) ?{{/U}}. ? ?Nutrient-rich foods are particularly important for Americans{{U}} ?(13) ?{{/U}}age 50. As we{{U}} ?(14) ?{{/U}}, we need to eat less because our bodies need{{U}} ?(15) ?{{/U}}calories to function properly. But we still need full measures of vitamins and minerals to release the energy in our foods and make us feel strong and healthy. |
A:little B:much C:less D:more
? ?阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
| {{B}}? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? Eat for a Good
and Healthful Life{{/B}} ? ?Food{{U}} ?(1) ?{{/U}}us alive. It is our sustenance and our pleasure. But recently, research has shown that the eating habits of the average Americans may be dangerous to future health. ? ?The foods Americans now choose are oftentimes too{{U}} ?(2) ?{{/U}}in calories and fats, so this article reports a new study: Diet and Health, Implications for Reducing Chronic Disease Risk. ? ?The study, conducted{{U}} ?(3) ?{{/U}}the National Research Council’s Committee on Diet and Health,{{U}} ?(4) ?{{/U}}that balancing nutrition, calories and activity is key{{U}} ?(5) ?{{/U}}enjoying a long and healthful life. ? ?The report recommends that most Americans increase{{U}} ?(6) ?{{/U}}activity to a moderate level and make changes in food{{U}} ?(7) ?{{/U}}and calories intake to maintain ideal weight. Most of us-- even those of us at ideal weight--need to eat{{U}} ?(8) ?{{/U}}fat so that no more than 30% of our dally calories will come from fat. ? ?That means cutting{{U}} ?(9) ?{{/U}}on red meat and whole milk dairy products.{{U}} ?(10) ?{{/U}}, eat fish, chicken without skin, lean meats, and low-fat and no-fat dairy products. ? ?The report of the Committee on Diet and Health recommends we eat five or more 1/2-cup servings of vegetables and fruits{{U}} ?(11) ?{{/U}}-- especially green and yellow vegetables and citrus fruits. ? ?Eating more fruits and vegetables doesn’t have to mean increased calories intake. Many plant foods are nutrient-rich: they provide many vitamins and minerals for very few{{U}} ?(12) ?{{/U}}. ? ?Nutrient-rich foods are particularly important for Americans{{U}} ?(13) ?{{/U}}age 50. As we{{U}} ?(14) ?{{/U}}, we need to eat less because our bodies need{{U}} ?(15) ?{{/U}}calories to function properly. But we still need full measures of vitamins and minerals to release the energy in our foods and make us feel strong and healthy. |
A:less B:fewer C:more D:enough
阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
|
Highways in the US ? ?The United States is well-known for its network of major highways designed to help a driver get from one place to another in the shortest possible time.{{U}} ?(51) ?{{/U}}these wide modern roads are generally smooth and well maintained, with{{U}} ?(52) ?{{/U}}sharp curves and many straight sections, a direct route is not always the most{{U}} ?(53) ?{{/U}}one. Large highways often pass{{U}} ?(54) ?{{/U}} scenic areas and interesting small towns. Furthermore, these highways generally{{U}} ?(55) ?{{/U}}large urban centers which means that they become crowded with{{U}} ?(56) ?{{/U}}traffic during rush hours, when the "fast, direct" way becomes a very slow route. However, there is{{U}} ?(57) ?{{/U}}always another route to take if you are not in a hurry. Not far from the{{U}} ?(58) ?{{/U}}new "superhighways", there are often older,{{U}} ?(59) ?{{/U}}heavily traveled roads which go though the countryside.{{U}} ?(60) ?{{/U}} of these are good two lane roads; others are uneven roads{{U}} ?(61) ?{{/U}}through the country. These secondary routes may go up step slopes along hilly{{U}} ?(62) ?{{/U}}or down frightening hillsides to towns{{U}} ?(63) ?{{/U}}in deep valleys. Though these are less direct routes, longer and slower, they generally go to places{{U}} ?(64) ?{{/U}}the air is clean and the scenery is beautiful, and the driver may have a chance to get a fresh, clean{{U}} ?(65) ?{{/U}}of the world. |
A:and B:less C:more D:or
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