_重庆成考网

From the passage we know that education in the humanities and society____．

• A、has not changed much
  

• B、pay attention to students’studying instead of teachers’teaching
  

• C、is much more important than that of science and mathematics
  

• D、has become more practical than theoretical

51.__________。

The main idea of this passage is____.

• A、warfare is a“law of nature”
  

• B、warfare is not a“law of nature”
  

• C、warfare does not control human population
  

• D、none of the lowlier animals, except ants，practice warfare upon their own species