【C8】
A. course
B. threshold
C. corner
D. verge
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
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
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