马克思地租理论认为：级差地租产生的根本原因是( )。A．自然

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问题单项选择题

马克思地租理论认为：级差地租产生的根本原因是( )。

A．自然条件的差异性

B．土地投入的不同

C．区位的差异

D．土地的有限性所引起的土地经营上的垄断

答案

参考答案：D

选择题

—What about the student in your class, Mr. Wang?

—The doctor said that ________ sleep caused him poor memory and poor concentration.

A．lacking of

B．lacked in

C．lacking

D．lack for

选择题

— Did you have a good May Day holiday?

— _____. I enjoyed myself with my family on the beach. [ ]

A. I'm afraid not

B. I'm not sure

C. Of course

D. I hope so