What does the underlined word “prevalent” in Paragraph 5 mean?

(单选题)What’s the meaning of the underlined sentence “I’m letting o (单选题)What does the underlined phrase “derived from” in the first (单选题)Effective communication is rendered possible between two con (单选题)Which of the following can be the best title for the text? (单选题)It can be inferred from the fourth paragraph that ______. (单选题)The company’s founders were motivated to make the new produc (单选题)What’s the meaning of the underlined word “those” in the fir (单选题)What’s the meaning of the underlined word “dividends” in the (单选题)Why are some people depressed and anxious day and night? (单选题)By using what John Lennon said, the writer intends to ______