《易经》把“六”定位阴数，把“九”定位阳数，九月九日，日月并阳，故而叫重阳。九九重阳，因为与“久久”同音，九在数字又是最大数，有长久长寿的含义。每逢重阳佳节，很多单位组织进社区,开展敬老活动。这表明（  ）

①透过传统节日可以领略民族文化的韵味      ②民族节日是珍贵的世界文化遗产，应积极保护

③传统美德生生不息、历久弥新              ④传统习俗有助于培育文明风尚

在一对相对性状的杂交实验中，子一代（F₁）未表现出来的那个亲本的性状叫

$6.\stackrel{.}{4}\stackrel{.}{9}$保留一位小数是____，精确到百分位是____，保留三位小数是____．

经济全球化极大地推动了世界各国的商品流通，而商品往往带有其自身的文化属性，如流行世界的牛仔裤和可口可乐，都被视为美国文化的代表，这说明（  ）

阅读短文，判断下列句子是否正确。
    Ann went to Qingdao with her friends on her holiday. They went there by train. They went to the beautiful beach. The weather was sunny and hot. So they had great fun playing in the water.They ate lots of fresh fish for lunch. In the afternoon, they rode bikes. Jack fell off his bike and hurt his leg. So Jack stayed at the hotel and watched TV. On the second day, Ann took many pictures of the sea. And she bought some gifts for her parents. Anyway, they had a good time.