堆码场地高于地面并需垫高40cm的堆码作业称为（）。

A.库房内堆码

B.货棚内堆码

C.集装箱堆码

D.露天场地堆码

Passage Four

Which of the following statements is true of John Maynard Keynes

A．He liked to attend beauty contests.

B．He would keep on buying and selling hot stocks.

C．He often bought in stocks of lesser companies.

D．He preferred investing stocks to trading stocks.