优先股的特征不包括（    ）。

(单选题)The author suggests that tax policies be aimed at ( ). (单选题)Education in the age of automation should put more emphasis (单选题)Which of the following best represent the author's view? ( (单选题)Who will be most threatened by automation? ( ) (单选题)Which of the following best fits the style of this passage? (单选题)What do the examples of watch show? ( ) (单选题)What is ageing? ( ) (单选题)The word "it" in the last sentence of Paragraph Two refers t (单选题)Which of the following statements is INCORRECT? ( ) (单选题)The best title for the passage may be ( ).