【正确答案】The exclusive sales and the sole agency.
   (1) The relationship between two parties is solely that of the seller and the buyer as to the exclusive sales, while the relationship is that of sale by proxy as to the sole agency.
   (2) The exclusive distributor will purchase and sell the goods in his own name, and assume solely the responsibility for his own profit or losses. As to the sole agency, the agent resells the goods in the agreed territory according to the trade terms stipulated by the principal. The agent charges a certain amount of commission and does not undertake any risks.
   (3) After the exclusive distributor has purchased the goods, he shall open an L/C by himself or pay the purchase price by other methods. In the case of sole agency, after the agent has introduced the goods to the buyer, the actual buyer shall open an L/C to the principal.