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【简答题】

A. Listen to the dialogue and decide whether the following statements are true (T) or false (F).(在每题后顶格填写T or F) 1. KFC China has achieved great success thanks to their flexible strategies. 2. KFC’s strategies in Western countries can work quite well in China. 3. Joint venture is the only form allowed by Chinese regulations for foreign companies. 4. KFC selected local partners at the beginning. 5. KFC offers a lot of localized food because Chinese people don’t like chicken very much. 6. KFC is more successful than McDonald’s both in and outside China. 7. Many rising fast-food chains have posed a threat to KFC nowadays. 8. KFC needs to introduce new products more frequently in order to stay on top.

题目标签:后顶
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【单选题】后顶点焦距为

A.
透镜系统的最后一块透镜到第一焦点之间的跟离
B.
透镜系统的第一块透镜到第一焦点之间的距离
C.
透镜系统的最后一块透镜到第二焦点之间的距离
D.
透镜系统的第一块透镜到第二焦点之间的距离
E.
透镜系统的第一焦点与第二焦点之间的距离