锅炉升压曲线的意义？
参考答案：
作为启动依据，指导启动升压过程，保证锅炉安全、经济运行。
—_______ good time we had at the party last night!
—Yes. It was _______ exciting party that I would never forget it. [ ]
A. What; so
B. How; such
C. What a: such an
D. How a; so an
泥质岩是由（）的碎屑和粘土矿物组成。
A、粗大
B、极细小
C、紧密
D、致密
