单项选择题 How many students are either juniors or males or both（）

单项选择题 In the world of art, distinguishing the authentic piece from the forgery is not an easy feat and often requires the use of multiple experts. Millions of dollars can be at stake, yet even experts can be fooled. However, a recent discovery has introduced a new resource for galleries and other groups seeking to establish the origins of their paintings: mathematicians. Math experts were able to analyze digital images of authenticated paintings where they found consistent differences in paint texture. This consistency suggests that each artist has a unique style of brush stroke that cannot be completely duplicated.In the first two sentences of the passage, the author suggests which of the following（）

单项选择题 If (7,3) is the center of the circle above, then the radius of the circle could be equal to which of the following（）