缺词填空 根据短文内容及首字母提示补全单词
    UNICEF works all over the world.
    UNICEF helps make the world a better place for c____ . We provide clean water, enough food and e____ for poor children in many countries.
    We want children to be healthy so we try to p____  illness. When they're sick, we pay for them to go to a doctor.We also think it's i____  that children go to school. Many children in p____  countries have to work to earn m____  for their families so they can't go to school.
    UNICEF raises money by s____ Christmas cards and organizing other fund-raising a____ .
    There are many w____  you can help UNICEF. You can send a donation or do some v____  work.

生物学是一门实验科学，下列有关生物学实验的叙述正确的是 （ 　）