①货币是商品交换发展到一定阶段的产物 ②货币可以表现和衡量其他一切商品价值的大小
③货币具有支付手段职能 ④货币的本质是一般等价物
①春天,皑皑的白雪开始消融;②夏天,青青的小草挂上露珠;
③秋天,浓浓的白雾慢慢散去;④冬天,静静的池塘覆上薄冰
Wild geese have ① lives. They fly from one place to another. They 2 homes twice every year. In spring, they fly ③ . In autumn, they fly 4 Why do wild geese move around so much? In winter,they cannot find 5 food in the north, so they fly south in autumn. Then in spring, it is warm in the north, so they fly 6 .
A. south B. back C. North D. busy E. enough F. change
① ② ③ ④
⑤ ⑥
满足约束条件
时,
的最大值为8,则实数
的值是( )

He do like that.



you the film?
材料1:环地中海沿岸图
材料2:环地中海的法国、西班牙、阿尔及利亚、突尼斯、以色列等国的种植业实行专业化生产,成为“时鲜业”的大规模生产基地,产品大量销往欧洲各地。随着保鲜技术的进步,市场前景更加看好。