题目内容
案例分析题As mentioned above, C imposes relatively few built - in ways of doing things on the program- mer. Some common tasks, such as manipulating (66) , (67) , and doing (68) (I/O), are performed by calling on library functions. Other tasks which you might want to do, such as creating or listing directories, or interacting with a mouse, or displaying windows or other (69) elements, or doing color graphics, are not defined by the C language at all. You can do these things from a C program, of course, but you will be calling on services which are peculiar to your programming environment (70) , processor, and operating system) and which are not defined by the C standard. Since this course is about portable C programming, it will also be steering clear of facilities not provided in all C environments. （66）处应选择（）
查看答案
搜索结果不匹配？点我反馈
更多问题
案例分析题The UNIX operating system is made up of three parts; the kernel, the shell and the programs. The kernel of UNIX is the （） of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to （） .The shell acts as an （） between the user and the kernel. When a user logs in, the （） program checks the username and password, and then starts another program called the shell. The shell is a command line （） (CLI). It interprets the commands the user types in and arranges for them to be carded out. The commands are themselves programs: when they terminate, the shell gives the user another prompt (% on our systems). The shell acts as an （） between the user and the kernel.
Read the following text. Choose the best word(s) for each numbered blank and mark [A], [B], [C] or [D] on ANSWER SHEET 1. Electricity plays an essential part in our life. No one can deny that electric light is necessary for people’s life. However, can you imagine such a world where there is no (21) of electric light As darkness falls over, children read in the light given by oil lamps and candles. Youths (22) time only by talking instead of watching TV. Everything is surrounded by (23) shadows. (24) , we have a man named Edison. He created bulb that (25) for two days before burning out. He also developed successfully a system for (26) electricity from a central powerhouse. It is he that gives us electric light, gramophone, moving pictures--all those we take (27) granted. After the invention of electricity, manufacturers increasingly applied the findings of invention to their businesses, (28) generating new industrial growth. Development of electricity leads to the (29) creations of new products and materials. In the past century and a half, electricity has steadily (30) . At first, it is scientific curiosity, then to a luxurious part of the (31) , and then to being necessary in every one’s life. Electricity has been common in the latest fifty years. Simple tasks, such as setting alarm clock to wake up at a (32) time or enjoying a piece of music, are accomplished via electronic means. We live with the benefits of electricity every day. As a result, we always think that whenever we (33) our gadgets into the wall socket, the power will be there. For most modern people, the loss of power means the complete loss of (34) . Their lifestyle is so dependent upon the grid’s constancy (35) they do not know how to live without it. How do you cook a meal without electricity if your gas stove has an electric ignition Please imagine the life without electricity further. What do you do with a freezer full of food in a hot day How do you find out what is happening in your area with the TV and radio off These are questions which should be seriously considered. Let us imagine the (36) of a short power outage together. Factories close down; phones and computers go dead; food (37) in refrigerators. What a disordered life that would be! All the convenience which electricity has brought to our life should owe to Edison. When Edison died at his home in New Jersey in 1931, the whole United States were switched off to mark his passing, and in (38) of the man whose discoveries had so changed and improved the life of people everywhere. For a moment, all was (39) -- as the world had always been before, until Edison (40) on the light.
Read the following text. Choose the best word(s) for each numbered blank and mark [A], [B], [C] or [D] on ANSWER SHEET 1. Electricity plays an essential part in our life. No one can deny that electric light is necessary for people’s life. However, can you imagine such a world where there is no (21) of electric light As darkness falls over, children read in the light given by oil lamps and candles. Youths (22) time only by talking instead of watching TV. Everything is surrounded by (23) shadows. (24) , we have a man named Edison. He created bulb that (25) for two days before burning out. He also developed successfully a system for (26) electricity from a central powerhouse. It is he that gives us electric light, gramophone, moving pictures--all those we take (27) granted. After the invention of electricity, manufacturers increasingly applied the findings of invention to their businesses, (28) generating new industrial growth. Development of electricity leads to the (29) creations of new products and materials. In the past century and a half, electricity has steadily (30) . At first, it is scientific curiosity, then to a luxurious part of the (31) , and then to being necessary in every one’s life. Electricity has been common in the latest fifty years. Simple tasks, such as setting alarm clock to wake up at a (32) time or enjoying a piece of music, are accomplished via electronic means. We live with the benefits of electricity every day. As a result, we always think that whenever we (33) our gadgets into the wall socket, the power will be there. For most modern people, the loss of power means the complete loss of (34) . Their lifestyle is so dependent upon the grid’s constancy (35) they do not know how to live without it. How do you cook a meal without electricity if your gas stove has an electric ignition Please imagine the life without electricity further. What do you do with a freezer full of food in a hot day How do you find out what is happening in your area with the TV and radio off These are questions which should be seriously considered. Let us imagine the (36) of a short power outage together. Factories close down; phones and computers go dead; food (37) in refrigerators. What a disordered life that would be! All the convenience which electricity has brought to our life should owe to Edison. When Edison died at his home in New Jersey in 1931, the whole United States were switched off to mark his passing, and in (38) of the man whose discoveries had so changed and improved the life of people everywhere. For a moment, all was (39) -- as the world had always been before, until Edison (40) on the light.
Read the following text. Choose the best word(s) for each numbered blank and mark [A], [B], [C] or [D] on ANSWER SHEET 1. Electricity plays an essential part in our life. No one can deny that electric light is necessary for people’s life. However, can you imagine such a world where there is no (21) of electric light As darkness falls over, children read in the light given by oil lamps and candles. Youths (22) time only by talking instead of watching TV. Everything is surrounded by (23) shadows. (24) , we have a man named Edison. He created bulb that (25) for two days before burning out. He also developed successfully a system for (26) electricity from a central powerhouse. It is he that gives us electric light, gramophone, moving pictures--all those we take (27) granted. After the invention of electricity, manufacturers increasingly applied the findings of invention to their businesses, (28) generating new industrial growth. Development of electricity leads to the (29) creations of new products and materials. In the past century and a half, electricity has steadily (30) . At first, it is scientific curiosity, then to a luxurious part of the (31) , and then to being necessary in every one’s life. Electricity has been common in the latest fifty years. Simple tasks, such as setting alarm clock to wake up at a (32) time or enjoying a piece of music, are accomplished via electronic means. We live with the benefits of electricity every day. As a result, we always think that whenever we (33) our gadgets into the wall socket, the power will be there. For most modern people, the loss of power means the complete loss of (34) . Their lifestyle is so dependent upon the grid’s constancy (35) they do not know how to live without it. How do you cook a meal without electricity if your gas stove has an electric ignition Please imagine the life without electricity further. What do you do with a freezer full of food in a hot day How do you find out what is happening in your area with the TV and radio off These are questions which should be seriously considered. Let us imagine the (36) of a short power outage together. Factories close down; phones and computers go dead; food (37) in refrigerators. What a disordered life that would be! All the convenience which electricity has brought to our life should owe to Edison. When Edison died at his home in New Jersey in 1931, the whole United States were switched off to mark his passing, and in (38) of the man whose discoveries had so changed and improved the life of people everywhere. For a moment, all was (39) -- as the world had always been before, until Edison (40) on the light.
微信支付 
支付宝支付