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编写函数实现字符串加密和解密，循环使用指定密钥，采用简单的异或算法。

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Can you choose the 5 principles?

A. Focus on language content that is relevant to you.
B. Use your language as a tool to communicate from day 1.
C. When you understand the message you will acquire the language unconsciously.
D. Language is not about accumulating a lot of knowledge but is rather a type of physiological training.
E. Psycho-physiological state matters – you need to be happy, relaxed, and most importantly, you need to be tolerant of ambiguity. Don’t try to understand every detail as it will drive you crazy.

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三亚三绝指的是梅花参、鮑鱼和( )。

A. 生蚝
B. 干贝
C. 鱼骨
D. 鱼翅

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广义上的菜又称“潮粤菜”,由( )发展而成。

A. 广州菜
B. 客家菜
C. 潮州菜
D. 汕头菜
E. 雷州半岛菜系

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著名的粤菜餐饮品牌有( )。

A. 广州酒家
B. 陶陶居
C. 莲香楼
D. 杏花楼
E. 大家乐

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