马拉松赛跑过程中，脂肪氧化供能起着节省（ ）的作用。

(单选题)What can we learn from the last paragraph? (单选题)What is the main idea of Paragraph 3? (单选题)According to the passage, Singlish probably is the result of (单选题)What does the author quote Jerlyne Ong’s message? (单选题)Kevin Janson mentioned Margaret Thatcher in order to ______. (单选题)What is the meaning to the underlined word in the third para (单选题)According to the research, we can learn that ______. (单选题)Why are women with wide faces easy to succeed? (单选题)According to the passage, most children tend to believe that (单选题)The author raises the questions in Paragraph 2 to introduce