竞争优势可以是产品质量、可靠性、( )、风格和形象以及及时的服务、热情的态度等。
A.可比性
B.适用性
C.工艺水平
D.销售额
参考答案:B
Alice, you were supposed ________ your paper last Sunday. Why haven't you finished it yet?[ ]
A. to finishing
B. to have finished
C. finishing
D. having finished
对吸水率大于2%的Ⅰ、Ⅱ型沥青混合料、沥青碎石密度测定可适用()。
A、表干法
B、蜡封法
C、冷冻法