A．livingB．drinkingC．foodD．shelter
A. living
B. drinking
C. food
D. shelter
核心产品是指【 】
A. 给消费者提供最基本的效用和利益
B. 指产品的外观
C. 给消费者提供的附加利益
D. 给消费者提供的附加服务
可转换公司债券在发行结束6个月后，方可转换为公司股票；对于分离交易的可转换公司债券，认股权证自发行结束至少已满6个月方可行权。()
A. 正确
B. 错误
What do we learn from the last para. ？ ______.
A. If we focus our attention on one thing, we might forget another
B. Memory depends to a great extent on the environment
C. Reception helps improve our memory
D. If we keep forgetting things, we'd better return to where we were
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