题目

汽车发动机外利用循环流动的水冷却发动机，这是因为水的（   ）A．热传递快B．温度降低得快C．比热容大D．内能多 答案：C解析:略---We all had a lot of fun at the barbecue yesterday. Pity you weren’t there. ---I really should have gone with you, but I ________ on some remaining problems. A．was working B．would workC．workedD．had worked