15. Worldwide demand for more _____ technology continues to grow.

A. subtleB. experienced

C. sophisticatedD. refined



sophisticated复杂的、久经世故的

subtle巧妙的、黯宛的、不明显的、不显著的、细微的、精细的

sob哭泣

sorrow痛苦

experienced有经验的

refine提炼、提纯

define下定义、有限的

indefinite无限的、不确定的

confine限制

affinity亲密