题目

 Jim has many hobbies, ________ swimming, hiking and playing badminton. A. for example   B. such for   C. such as    D. as the example of 答案：C19．设U为全集，A、B是U的子集，则“存在集合C使得A⊆C，B⊆∁UC”是“A∩B=ϕ”的充要条件条件．（选填“充分不必要”、“必要不充分”、“充要”、“既不充分也不必要”）