2014
高考英语阅读理解基础练习（6）及答案 (2012•河北省普高质检) in an ideal world, people would not test medicines on animals. such experiments are stressful and sometimes painful for animals, and expensive and timeconsuming for people. yet animal experimentation is still needed to help bridge vast gaps in medical knowledge. that is why there are some 50 to 100 million animals used in research around the world each year. europe, on the whole, has the world's mo
