将淀粉、碘化钾的混合溶液盛放在半透膜袋里，浸放在一杯蒸馏水中，过几分钟后进行下列实验，其现象正确的是（　　）

短文填空：先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的单词。使短文完整。所填单词必须在答题卡标有题号的横线上完整写出。
        On Thanksgiving Day. About 88 percent of Americans eat turkey. But one l ____  turkey not only survives but also becomes famous! Every year, turkey farmers p ____ a turkey to the U.S. president. However the president does not e ____ this turkey. But gives in a “pardon”. The turkey is s____ to Florida for a Thanksgiving parade. Then it lives on a farm for the r ____ of its life.
         Turkeys come from North America and have been part of American culture for c____ . Benjamin Franklin even wanted the turkey, i ____ of the bald eagle, to be America's icon.
     Turkeys living on farms are large birds that cannot fly. But w ____ turkeys are quite fast. They can fly at a s ____ up to 88 kilometers per hour. They can also run as fast as 40 kilometers per hour.
     Turkeys don't have ears. They h  ____ with a snood (肉垂) above their beaks. But their hearing is five times better than human's.