对（）而言，火候表示单位时间内其所达到的温度和向食物所提供热量的多少。
A．传热介质
B．热源
C．原料
D．火力
参考答案：A
35．The highest award was given to Anna, who_________so hard on the project for years, and at last her efforts paid off.
A．has worked
B．worked
C．was working
D．had been working
中心站突然收不到某遥测站的数据，原因是中心站天馈线出了问题。（）
