题目内容
The energy problem is not merely a short-term crisis. Geologists 【1】 that 80 percent of all the oil 【2】 in the US will be used 【3】 before the year 2000. We might even come to the end of our coal reserves, abundant as they are, before another century is over. Americans have been 【4】 this situation suddenly. Many unprepared even to recognize 【5】 , and most of us are unprepared to meet it. We are unprepared 【6】 our habits and traditions, and our national life 【7】 based on a history of material abundance. With about 6 percent of the world’’s 【8】 ,we in the US 【9】 nearly 50 percent of the world’’s energy resources. Such resources within the us 【10】 are still ample by any standards except our own.
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基本的作业调度算法有哪些
Next week, as millions of families gather for their Thanksgiving (感恩节) feasts, many other Americans will go without. According to the United States Department of Agriculture, more than 12 million households lack enough food for everyone in their family at some time during the year—including holidays. Hunger is surprisingly widespread in our country—one of the world’’s wealthiest—yet the government estimates that we waste almost 100 billion pounds of food each year, more than one-quarter of our total supply. Reducing this improper distribution of resources is a goal of America’’s Second Harvest, the nation’’s largest domestic hunger-relief organization. Last year, it distributed nearly 2 billion pounds of food to more than 23 million people in need. America’’s Second Harvest is a network of 214 inter-connected food banks and other organizations that gather food from growers, processors, grocery stores and restaurants. In turn, the network distributes food to some 50,000 soup kitchens, homeless shelters and old people’’s centers in every county of every state. A great deal of work is involved in distributing tons of food from thousands of donors (捐赠者) to hundreds of small, nonprofit organizations. Until a few years ago, America’’s Second Harvest lacked any effective way to manage their inventory. Without accurate and timely information, soup kitchens were sometimes empty while food was left to spoil in loading places. In 2000, America’’s Second Harvest began to use a new inventory and financial-management system—Ceres. It is software designed specifically for hunger-relief operations. It is used by more than 100 America’’s Second Harvest organizations to track food from donation to distribution. Ceres has helped reduce the spoiling of food and improve distribution. An evaluation found that the software streamlined food banks’’ operations by 23 percent in the first year alone. With more accurate and timely reports, Ceres saves time, flees staff members to focus on finding new donors, and promises more efficient use of donations. Hunger in America remains a troubling social problem. Technology alone cannot solve it. But in the hands of organizations such as America’’s Second Harvest, it is a powerful tool that is helping to make a difference—and helping more Americans to join in the feast. According to the passage, the total supply of food in America every year reaches______.
在存储器可变式分区管理中，对内存状态的记录和分配管理通常可采用表格法、位图法和______、
试述太平天国运动的历史意义及其失败的教训。
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