* * 后脓肿切开术的切口位置应在（） A.沿乳晕做环形切口 B.沿 * * 下皱褶处弧形
题型：单项选择题
问题：
* * 后脓肿切开术的切口位置应在（）
A.沿乳晕做环形切口
B.沿 * * 下皱褶处弧形切口
C. * * 两侧对应切口
D.在 * * 中部楔形切口
E.腋窝切口
题型：单项选择题
On the day of the performance of a certain play, each ticket that regularly sells for less than$10,00 is sold for half price plus $0.50, and each ticket that regularly sells for$10.00 or more is sold for half price plus$1.00. On the day of the performance, a person purchases a total of y tickets, of which x regularly sell for $9.00 each and the rest regularly sell for $12.00 each. What is the amount paid, in dollars, for the y tickets ？（）
A.7y-2x
B.12x-7y
C.
D.7y+4x
E.7y+5x