属于定量预测方法的是 ( )
A.市场调研
B.小组共识
C.德尔菲法
D.回归分析
参考答案:D
解析:除回归分析为定量预测法外,其他各项均为定性分析方法。
Great as Newton was, many of his ideas _______ today and are being modified by the work of scientists of our time.
A.are to challenge
B.may be challenged
C.have been challenged
D.are challenging
合理确定工程造价,就是要求工程造价的确定要具有()。
A.科学性
B.预见性
C.经济性
D.合理性