某企业借口金融危机企业要生存需要加强管理，在工人上下班时要搜身，这是（    ）

高粱有红茎（R）和绿茎（r），如果一株高粱穗上的1000粒种子萌发后长出760株红茎植株和240株绿茎植株，则此高粱的两个亲本的遗传因子组成是（ ）。

   Now many students have become crazy about c ____  cards in my school. Some have been collecting them ____ about three years. After one gets card, he will____ (分享)it with his friends. Many students are so addicted (上了瘾的) to it that they have changed a lot. Some students even play with the cards in class. So they have fallen behind in their____ .
   The card is i ____  as a gift in the bag of some food. T ____ , to get these cards, many students try their best to ask for ____  from their parents. I hear Tim and Tom have already collected more than one t____  cards from stores or their friends.  ____  is not long for them to collect a lot of cards. But without good care, the cards can be taken away easily by other collectors. So many students fight with each other for the cards.
   I suggest that as a student, we shouldn’t be too fascinated(感到，着迷的) in collecting cards ____  longer. Study hard and become a good host of the future!