______ she is sick or not, she is always happy. [ ]
A. Weather
B. Whether
C. If
答案:B
保税监管区区内企业凭进口货物报关单或凭进境备案清单购汇支付的,银行应办理()的核注、结案等手续。
A.电子口岸系统
B.贸易信贷登记系统