人员推销：是企业运用推销人员直接向顾客推销商品和劳务的一种促销活动。根据以上定义，下

The Customs surveillance zone include following places except ______.

A．Any seaport, railway and high way station, airport, border pass or international postal matter exchange where there is a Customs establishment
B．any place where Customs control is conducted
C．any place without a Customs establishment but which has been approved by the state council as a point of entry and exit
D．any place along the border of the country

临床资料：女，37岁，孕30周。超声综合描述：胎儿颅骨光滑完整，脑中线居中，小脑延髓池宽0.95cm。超声提示（）

A.脑脊膜膨出

B.小脑延髓池消失

C.小脑延髓池正常

D.小脑延髓池增宽

多项式2²t²+3t-1的次数是______．

数据库设计的需求阶段主要设计

A．程序流程图

B．程序结构图

C．框图

D．数据流程图