．（11分）下图为世界某地区七月份等温线图（单位：℃），读图回答有关问题。

（1）图中A处闭合等温线内的气温应介于_______℃之间。（1分）

（2）图中B、C、D三处位于同一纬度地带,但B处气温______(高于或低于)C、D两处，简答形成这一现象的主要原因。（3分）

（3）比较图中B、E两海区水盐度的差异，并简述产生差异的主要原因。（4分）

（4）说明巴拉那河（拉普拉塔河的上游）流经地区的主要气候类型，并分析气候对该河流径流量季节变化的影响。（3分）

When a party to a forward contract terminates the contract prior to the original expiration date by entering into a perfectly offsetting forward contract with a second counterparty:()

A. the party terminating the forward contract has no default risk, but both counterparties face default risk. 

B. there is no future liability, but default risk remains for all parties until the original contract settlement date. 

C. the party terminating the contract is exposed to default risk, but has no further asset price risk.