物业管理是房地产开发的延续,是在房地产开发经营中为完善市场机制而逐步建立起来的一种综合性经营服务方式,其对消费环节的市场有着()的作用。
A. 培育
B. 培育和完善
C. 完善
D. 培育和提高
查看答案
If X and Y are complementary goods, a decrease in the price of X will result in______.
A. an increase in the demand for Y
B. a decrease in the demand of Y
C. a decrease in the quantity demanded of X
D. none of the above
听力原文：W: The red and white shirt looks nice.
M: Thank you, but I like green best.
What color does the man like？
A. Red and white.
B. Green.
C. Red.
在回归模型中，随机误差项反映了自变量对因变量的影响。()
A. 正确
B. 错误
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