日本发展工业的不利条件是（ ）

求代数式的值：若a、b互为相反数，c、d互为倒数， x 等于4．求代数式 的值．

材料一：美国加利福尼亚州人口3 900多万，占全国12．1%。该州是美国农业最发达的州，甘蔗、蔬菜、水果、棉花、稻米产量居全国突出地位，也是重要的牛奶、蛋、肉产地，中央谷地是核心产区。

材料二：近年来，美国不少汽车、电器、服装等企业把工厂转移到墨西哥，据统计，有58．4%的工厂设在墨西哥北部边境。

材料三：加利福尼亚州地区图及美国和墨西哥部分地区图。

短文填空

根据下列短文内容，用下列动词的适当形武填空，必要的时候添加助动词。

    Many people say that they ____ too many hours. They don't have free time with their families. They can't take care of things at home. They don't have time ____.

    Work hours are different from one country to another. In France, people spend about 1,646 hours a year at work. In Japan, however, people work about 2,159 hours a year. That____ a Japanese worker works 513 more hours a year than a French worker. That is about 12 weekends of extra (额外的) work!

    Why do people work so many hours? Some people work extra hours because they want____ more money, but many companies ____ for extra work. The people in these companies work extra hours because they think it's their duty. Some people are afraid they ____ their job if they don't work extra hours.

     Many people say that their vacations are too short. In France, people ____ five weeks of paid vacation. In Germany, they get about four weeks. In the United States, two weeks of vacation ____ the average(平均). And many people don't use all of their vacation days. In one survey, in England, fewer than half of workers ____ all their vacation days. In English, people say, "All work and no play____ Jack a dull boy." That is true, there are a lot of dull people in the world.