房地产开发商根据估计的总销售收入和估计的销售量来制定价格的方法,属于( )。
A. 成本导向定价法
B. 购买者导向定价法
C. 竞争导向定价法
D. 市场导向定价法
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Please don't come this time tomorrow, sir. They ______a meeting then.
A. will be having
B. are having
C. will have
设Fn(x)是来自总体X容量为n的简单随机样本的经验分布函数,F(x)是总体X的分布函数,则下列命题错误的是:对于每个给定的x,Fn(x)
A. 是分布函数.
B. 依概率收敛于F(x).
C. 是一统计量.
D. 的数学期望是F(x).
Five hundred critically-iii patients were investigated with the main purpose of ______.
A. observing how they reacted to the crisis of death
B. learning how to best help themselves and their families
C. finding out their attitude towards the approach of death
D. helping themselves and their families overcome the fear of death
在计算机系统中采用总线结构,便于实现系统的积木化构造,同时可以______。
A. 提高数据传输速度
B. 提高数据传输量
C. 减少信息传输线的数量
D. 降低指令系统的复杂性