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【单选题】
关于市场预测方法的特点，下列表述不正确的是( )。A.
定性方法的精确度较好，适用于长期预测
B.
回归模型和消费系数法需要多年的数据资料，精确度很好
C.
移动平均法和指数平滑法适用于近期或短斯预测
D.
趋势外推法要求至少10年的数据资料，适用于中长期预测
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举一反三
【简答题】如果关于x的方程x 2 +2（a+1）x+2a+1=0有一个小于1的正数根，那么实数a的取值范围是______．
【单选题】What is true about the IKEA effect?
A.
It refers to the phenomenon that people usually undervalue their creations.
B.
It is put forward by the honorable and successful manufacturer IKEA
C.
It explains why the participants think highly of their own origami.
D.
It accounts for the popularity of do-it-yourself among youngsters.
【单选题】Usually people under stress _____ express their full range of potential.
A.
care for
B.
tend to
C.
happen to
D.
lead to
【单选题】“Multi local people” usually refers to those people who are under the impact of different culture.
A.
T
B.
F
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