若方程$\frac{3}{x+3}=\frac{2}{x+k}$ 的根为正数，则k的取值范围是（     ）

       A hot dog is one of the most popular American food. It was named after frankfurter, a German food. You may hear “hot dog”1in other ways. People sometimes 2“hot dog” to express pleasure(快乐). For example, a friend may ask 3 you would like to go to the cinema. You might say, “Great. I’d love to. ” Or, you could say,”4! I'd love to go.” People 5use the expression to describe someone who is a “show-off”, who tries to show everyone else how 6he is. You often hear such a(n)7called a “hot dog”. He may be a basketball player, for example, who 8the ball with one hand making a(n) 9 catch seem more difficult. You know he is a “hot dog” because when he makes such a catch, he bows(鞠躬) to crowd, hoping to10their cheers.