15. Worldwide demand for more _____ technology continues to grow.
A. subtle B. experienced C. sophisticated D. refined
<sophisticated>
sophisticated 复杂的、久经世故的
</sophisticated>
<subtle>
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
</subtle>
<experienced>
experienced 有经验的
</experienced>
<refine>
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
</refine>
