阅读下面短文，根据题目要求做出最佳答案。

    Are you looking for something fun and would you like to help others in your spare time? Then join us to be a volunteer! We're a non-profit (赢利的) organization. We have volunteer jobs of all ages. Anyone, from twelve-year-old children to people in their seventies can become a volunteer.

    You can help people in many ways. Schools need help with taking care of children while parents are working. Hospitals need volunteers to look after children while their parents are seeing a doctor. Animal lovers can help take care of those dogs and cats without homes. There is something for everyone.

“As a volunteer, I don't want to get anything. Seeing the children's happy faces, I'm happy, too.” Said Carlos Domingo, an old woman of 62. “I often played computer games in my spare time before. Now I help older people learn how to use computers.” said another volunteer at the age of 18.

    If everyone helps out a bit, we'll have a better world to live in. Interested? Call us 1-800-555-5756 or visit our website: www.activol.com.

①将两只空烧杯分别放在天平的左右两盘内，把合金块放入左盘烧杯中；

②向右盘烧杯中缓缓倒水，再用滴管调节，直至天平平衡；

③将烧杯内水倒入空量筒中，测出水的体积（如图a所示）；

④用细线拴好合金块，将其放入图a的量筒内，测出水和合金块的总体积（如图b所示）．则

    Chinese are very generous (慷慨) when it comes to educating their children. Not caring about the money, parents often send their children to the best schools or even abroad to England, the United States or Australia. They also want their children to take extra-course activities. The Chinese believe that the more expensive an education is, the better it is.  However what most parents fail to realize is that today's children lack self-respect and self-confidence.
    Parents can achieve this by teaching practical skills like cooking, sewing and doing other housework.
    Cooking demands (要求)patience and time.  A good cook always tries to improve his cooking. so he will learn to work hard and gradually(逐渐), finish his job successfully.  His result, a well-cooked dinner, will give him much satisfaction and a lot of self confidence.
    Some old machines, such as a broken radio or TV set that you give your child to play with will make him curious and arouse his interest. He will spend hours looking at them, trying to fix them; your child might become an engineer when he grows up.  These activities are not merely   teaching a child to read a book, but rather to think, to use his mind. And that is more important.

1962年11月，苏共中央决定改组党的领导机构，在地方取消统一的党委会，分别设立领导工业生产的党委会和领导农业生产的党委会，两个党委会互相独立，互不隶属。该措施（    ）