题目：
Software design is a (66) process. It requires a certain (67) of flair on the part of the designer. Design can net be learned from a book. It must be practiced and learnt by experience and study of existing systems. A well (68) software system is straight forward to implement and maintain, easily (69) and reliable. Badly (68) software systems, although they may work are (70) to be expensive to maintain, difficult to test and unreliable.
66（）
A．create
B．created
C．creating
D．creative
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B, C解析：现浇混凝土楼梯按设计图示尺寸以水平投影面积计算。不扣除宽度小于500mm的楼梯井，伸入墙内部分不另增加。如直形楼梯、弧形楼梯等。计量单位为㎡。
