49. What prevented Chris Cocalis from developing ebikes sooner?
- A. Retailers' refusal to deal in ebikes.
- B. High profits from conventional bikes.
- C. Users' concern about risks of ebike riding.
- D. His focus on selling costly mountain bikes.
答案：A
答案句：Two years ago, CEO Chris Cocalis of Pivot Cycles, which sells high-end mountain bikes, found that U.S. bike shops weren't interested in stocking ebikes. Some retailers warned Cocalis that they'd drop the brand if it came out with an electric bike.
参考译文：两年前，销售高端山地自行车的Pivot Cycles首席执行官Chris Cocalis发现，美国自行车商店对库存电动自行车不感兴趣。一些零售商警告Cocalis，如果推出电动自行车，他们将放弃该品牌。
定位线索：题干“What prevented Chris Cocalis from developing ebikes sooner?”→答案句取自第6段“U.S. bike shops weren't interested in stocking ebikes. Some retailers warned Cocalis that they'd drop the brand if it came out with an electric bike.”；文中“weren't interested in stocking ebikes”和“drop the brand”对应选项A“Retailers' refusal to deal in ebikes”。
解析：题干问什么阻碍了Chris Cocalis更早开发电动自行车。答案句明确指出美国自行车商店不感兴趣，零售商甚至威胁放弃品牌，即零售商拒绝经营电动自行车，因此选项A正确。选项B“传统自行车的高利润”文中未提及，属于无中生有；选项C“用户对电动自行车风险的担忧”文中未提及风险，属于无中生有；选项D“他专注于销售昂贵的山地自行车”文中虽提到他销售高端山地自行车，但这不是阻碍原因，属于答非所问。
50. What makes Chris Cocalis believe there is a greater opportunity for ebike sales?
- A. The further lowering of ebike prices.
- B. The public's concern for their health.
- C. The increasing interest in mountain climbing.
- D. The younger generation's pursuit of comfortable riding.
答案：D
答案句：“There's tremendous opportunity to get a generation of people for whom suffering isn't their thing,” Cocalis said. “Ebike riders get the enjoyable part of cycling without themassive suffering of climbing huge hills.”
参考译文：“有巨大的机会吸引一代人，对他们来说受苦不是他们的追求，”Cocalis说。“电动自行车骑行者能享受骑行的乐趣，而无需承受爬大山的巨大痛苦。”
定位线索：题干“What makes Chris Cocalis believe there is a greater opportunity for ebike sales?”→答案句取自第7段Cocalis的话“There's tremendous opportunity to get a generation of people for whom suffering isn't their thing...”；文中“a generation of people for whom suffering isn't their thing”和“without the massive suffering”对应选项D“The younger generation's pursuit of comfortable riding”。
解析：题干问什么让Chris Cocalis相信电动自行车销售有更大机会。答案句指出有一代人不想受苦，电动自行车让他们享受骑行乐趣而无需承受爬坡痛苦，即年轻一代追求舒适骑行，因此选项D正确。选项A“电动自行车价格进一步降低”文中未提及，属于无中生有；选项B“公众对健康的关注”文中未提及健康，属于无中生有；选项C“对爬山兴趣的增加”与原文“without the massive suffering of climbing huge hills”相反，属于偷换概念。