我国规定责任疫情报告人发现艾滋病、肺炭疽的病人、病原携带者和疑似病人时，报告时限在城镇不超过

A．4小时

B．6小时

C．8小时

D．10小时

E．12小时

Pre-entry refers to the （） of Customs entry documents for an export consignment before it actually leave the country.

A. report

B. submission

C. issue

D. order