巴班斯基的教学最优化是指什么最优化？（ ）

(单选题)What does the underlined word “alternative” mean in Chinese? (单选题)Why does the fourth paragraph take Space Science in context (单选题)What is the public’s attitude towards online conference? (单选题)Which of the following is NOT a potential attendee? (单选题)After the Englishman explained the idiom, _______. (单选题)Which of the following is true according to the passage? (单选题)The underlined word in the first paragraph probably means __ (单选题)At first, on hearing “You don’t say,” I thought the foreigne (单选题)A year ago, I paid no attention to English idioms because __ (单选题)The article mainly talks about ______.