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．foreground

B．background

C．screen

D．scenes

属于我国社会主义法律制定的根本指导思想的是( )。

A．实事求是从中国的实际出发的原则

B．领导与群众路线相结合的原则

C．原则性与灵活性相结合的原则

D．四项基本原则(即：坚持社会主义道德、人民民主专政、 * * 党的领导和马列主义、毛 * * 思想的原则)