下列句子中，加下划线的成语使用正确的一项是（??）。
- A.刘翔虽然只比师弟史冬鹏大几岁，但对他身上体现出的年轻人的活力和不服输精神无比欣赏、敬服，两人在艰苦的训练生活中结为了忘年之交
- B.有消息称，“达芬”是目前预防甲型HINI流感病毒的特效药。目前深圳有关部门购买储备了大量“达芬”，以备不时之需
- C.全书收集了汪曾祺从1941年的第一篇小说到临终前的几乎全部作品。这对众多的“汪迷”来说，真可谓大快朵颐了
- D.西部地区虽说目前各方面的条件要艰苦一些，但那里自然资源丰富，发展前景广阔.像你这样的人才一旦到了那里，一定能大有可为
正确答案及解析
正确答案
解析
A项，“忘年之交”指年岁差别大、行辈不同而交情深厚的朋友。而句中刘翔“只比师弟史冬鹏大几岁”，使用不当。B项，“不时之需”意指不确定某个时候就会需要。用于句中，合适。C项，“大快朵颐”指大饱口福．痛快淋漓地大吃一通。用于句中，不当。D项，“大有可为”是指事情很值得做，很有发展前途。通常用于修饰事情。而不能用于修饰人，故用于句中，不当。本题当选B项。
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