A typical (36) language contains an applicative sub-language which approximates the mathematical abstractions of "timeless" functions applied to’ "spaceless" values, where the actual operation sequences and use of storage space during expression evaluation are organized behind the (37) . In this setting, values are data structures of low volume, typically a few computer words or less, which means that an illusion of spacelessness can be realized by having (38) results during expression evaluation stored at the discretion of the language implementation, and effecting parameter (39) and (40) operations through value copying.

A．assignment

B．design

C．value

D．dispatch

人体所需的产能营养素普遍存在于各种食物中，但（）一般含能量较少。

A、蔬菜和水果

B、粮食和薯类

C、动物肉和蛋

D、大豆和坚果