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关系模型是通过表格数据来表示和实现两个实体之间的联系。()

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收信人：Kevin Brown
寄信人：Paula Paltridge
日期：2008年10月25日
内容：本公司已收到贵公司2008年10月12日寄出的宣传单，我们对贵公司生产的中国丝绸衬衫非常感兴趣。本公司在欧洲几个国家都有较大的市场，相信只要贵公司价格合理，本公司一定能提供较大的订单。贵公司能否寄一份目录和价格表？能有样品，则更好。
Words for reference：宣传单circular，订单orders，目录catalogue，样品sample

There are some great differences between a traditional family and a modern one. The first

客户机/服务器有三个基本组成部分：客户机、服务器、客户机与服务器的连接。()

Now read the passage about animal protection. You will have 45 seconds to read the passage.
Begin reading now.
Reading Time: 45 seconds
Living in Harmony with Animals
If you are looking to help animals, look no further than your day-to-day activities. Every day offers new opportunities to live more humanely. You don't have to make radical changes—even small changes can make a big difference. The three Rs of humane living—reduce, refine, replace—can help you make choices. Here's an example of how to apply the three Rs to the food you eat. Reduce the amount of meat, eggs, and dairy products in your diet; refine your eating habits by choosing more humanely produced options; and replace animal products with vegetarian choices.