在办理提货担保业务时，进口商为及时提货要向开证银行申请开立（）

A.进口信用证

B.提货保函

C.银行信贷证明

D.备用信用证

Radar makes the most accurate determination of the（）.

A.direction of a target

B.distance to a target

C.size of a target

D.shape of a target