下列对马歇尔需求函数与希克斯需求函数的描述不正确的是(， )。
A. 定义域不同
B. 值域不同
C. 互为对偶规划的解
D. 马歇尔需求函数可以被观察到，希克斯需求函数一般无法被观察到
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A．He often attended television programs to propose ideas.B．He invited over 40 people t
A. He often attended television programs to propose ideas.
B. He invited over 40 people to show their ideas in a period.
C. He would evaluate the ideas along with his top assistants.
D. He devoted a day to listening to ideas every three months.
【C19】
A. pressure
B. weight
C. load
D. restraint
【C3】
A. question
B. issue
C. episode
D. matter
【C17】
A. ascribed to
B. assaulted by
C. fascinated with
D. addicted to
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