下午平均每次要运多少棵白菜才能运完？

How does the boy like the concert?    

（Ⅰ） 求这20名工人年龄的众数与平均数；

（Ⅱ） 以十位数为茎，个位数为叶，作出这20名工人年龄的茎叶图；

（Ⅲ） 从年龄在24和26的工人中随机抽取2人，求这2人均是24岁的概率．

阅读课文《陋室铭》，完成各题。

阅读短文，根据要求完成下面各小题。
    The students' life today can be very stressful (紧张的). They are under pressure (压力) every day. They need a (1)break from it. Parents should ask children to do something else. But not let them relax in front of the TV.  A hobby is the perfect answer.
    There are many different kinds of hobbies. Chess is a good example. It is a very enjoyable game and it also helps children develop their thinking skills.
    Collecting something is also a good hobby for children. A child can collect almost anything: key rings, stamps, postcards, old coins, etc. Many of these collecting can be both interesting and fun. They teach children a lot and broaden (开阔)their knowledge. For example, gardening (园艺) is a useful hobby because it is a physical activity and it also teaches children about nature.
    (2) A hobby can be a useful learning tool. Children may become experts in something if they really love their hobbies. Children will also learn to become more organized and make places, for example in collecting something. Hobbies will also teach children a lot about responsibility(责任).