单选题 Working in the customs, I feel both exciting and challenging, for I have to face the difficulties of dealing with ______ groups of people.

【正确答案】 D

【答案解析】[解析] 各项的意思是：delicate“易碎的，(人)纤弱的”；deliberate“故意的，蓄意的”；discrete“不连续的，离散的，分开的”；disparate“迥然不同的”。