区域性银行汇票无论背书是否超出本区域，持票人必须在本区域内提示付款。
参考答案：对
如图箭头所示为颅内哪根血管，试述其主要供应区。
_______ he worked hard, _______ he failed in the exam. [ ]
A. Although, but
B. Though, but
C. Although, /
D. But, although
