糖类又叫碳水化食物，包括淀粉、蔗糖、葡萄糖、果糖、纤维素等。
参考答案：对
— What is the price of gas these days?
— Oh, it _______ sharply since last month. [ ]
A. is rising
B. has risen
C. is arising
D. has arisen
高炉各部位热负荷最大的部位除风口外是（）。
A、下部炉缸
B、风口带
C、炉腹、炉腰
D、炉身中下部
