观察鲫鱼时，我们看到鲫鱼的身体呈        形，这种体形在它游泳时可以起到减小          的作用。

In insurance, the party who insures others against possible loss or damage and promises to effect payment in case of loss or damage is called（）.

A．insured

B．insurance

C．underwriter

D．consignor