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.

38（）

A. assignment

B. design

C. value

D. dispatch

左向右分流的先天性心脏病人出现下列哪种情况麻醉风险最大（）

A．房性早搏

B．肺动脉高压

C．活动后心悸

D．心脏杂音粗糙而响亮

E．胸片示肺纹理增多