单项选择题
A．presenting an argument to support a particular hypothesis
B．suggesting an answer to a theoretical question
C．questioning the assumptions of a research project
D．criticizing experimental results
E．explaining the origin of certain scientific data
单项选择题 According to the passage, astronomers studying Martian meteors discovered on Earth were perplexed by them for which of the following reasons（）
单项选择题 Which of the following, if true, would cast most doubt on the conclusions drawn from Head's higher-resolution models（）
单项选择题 BIGOT: INTOLERANT ::（）