The government should distinguish between unlabeled use and disapproved use of a drug by ______.

单项选择题By using the phrase the concept of art. imposed by the triumph of Modernism , the author means that art should be ______.

单项选择题Which of the following best expresses the author's main concern

单项选择题The author uses Abstract Expressionist painter as an example to show that ______.

单项选择题According to the passage, all the following are true except ______.

单项选择题It is implied that many professional photographers are of the opinion that ______.