____ he ____ help his mother ____ housework？

生物兴趣小组的同学通过实验证明了光对鼠妇的生活有影响之后，又想通过实验来探究土壤的潮湿程度是否对鼠妇的生活有影响，请你参与设计探究方案，并回答下列有关问题：
（1）提出问题：土壤的潮湿程度会影响鼠妇的生活吗？
（2）作出假设：土壤的潮湿程度会影响鼠妇的生活。
（3）制定计划：
材料用具：20只鼠妇、铁盘、玻璃板湿土（潮湿程度相当）、干土
设计实验装置：在铁盘以内横中轴线为界，一侧放上一层干土，另一侧放上一层湿土，至于阴暗处。
方法步骤：A                                                 B                                                   
（4）实施计划：略
（5）可能出现的实验结果
A铁盘内湿土的一侧鼠妇数目多于干土一侧鼠妇数目；
B                                            ；C                                            ;
（6）根据上述实验结果 ，你得出的结论是                                                            .

C

    There are many new ways of shopping in the world. Do you know all of them?

    One popular way is catalog shopping(目录购物). There are catalogs for almost anything you need—like clothes, furniture, cooking and so on. People also order about 40% of their music from music club catalogs.

    Another way of shopping is shopping by TV. It began in 1986. About 5% to 8% of the Americans now shop by television. People say that it is easier than shopping in a shop. TV shopping is late at night, so people can "go shopping" happily after a day's work.

    Computer shopping or "shopping online" is interesting to more and more people. Is computer shopping the way of tomorrow? Already, people can use their computers to order many different things, such as computers, flowers, food and T-shirts. Soon people may be able to shop for anything, anytime and anywhere in the world.