Smile is recognized as a/an language which can be understood by people all over the worl

问题补充：

Smile is recognized as a/an language, which can be understood by people all over the world.

A. artificial

B. technological

C. universal

D. analytical

答案：

A. artificial

B. technological

(答案→)C. universal

D. analytical

解析：A. artificial人造的 B. technological技术的 C. universal通用的 D. analytical善于分析的；句意：微笑被认为是一种通用语言，它能被全世界的人们理解。故选C