Read the following passage and m...

Câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 30 to 34.

A. The importance of models in scientific theories. 

B. The sorts of facts that scientists find most interesting. 

C. The ways that scientists perform different types of experiments. 

D. The place of theory and hypothesis in scientific investigation.