A —favorable balance of trade B —special preference
C —transit trade D —tariff harrier
E —inland trade F —inquiry
G —blank endorsed H —customs clearance
I —carrier J —middleman
K —cargo receipt L —shipping order
M —delivery N —import licence
O —unfavorable balance of trade P —partial shipment
Examples: (M) 交货 (J) 中间商
51. ( ) 贸易逆差 ( ) 承运货物收据
52. ( ) 结关 ( ) 分批装运
53. ( ) 关税壁垒 ( ) 进口许可证
54. ( ) 贸易顺差 ( ) 托运单
55. ( ) 转口贸易 ( ) 空白背书

（）关税壁垒（）进口许可证

A —favorable balance of trade B —special preference
C —transit trade D —tariff harrier
E —inland trade F —inquiry
G —blank endorsed H —customs clearance
I —carrier J —middleman
K —cargo receipt L —shipping order
M —delivery N —import licence
O —unfavorable balance of trade P —partial shipment
Examples: (M) 交货 (J) 中间商
51. ( ) 贸易逆差 ( ) 承运货物收据
52. ( ) 结关 ( ) 分批装运
53. ( ) 关税壁垒 ( ) 进口许可证
54. ( ) 贸易顺差 ( ) 托运单
55. ( ) 转口贸易 ( ) 空白背书