题目内容
在关系模式R(D，E，G)中，存在函数依赖关系{E→D，(D，G)→E}则候选码为 【7】 ，关系模式R(D，E，G)最高可以达到 【8】 。
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It’s a pleasant 73 degrees here. For those of you travelling tomorrow, here is a quick look at the weather for cities around the world. In Amsterdam, it should be clear tomorrow with a high of (1)and a low of 70. Athens is also expected to be clear with a high of 80 and a low of 70. We also expect Beijing to be cloudy with a high of 96 and a low of (2). It will also rain in Cairo but much (3) with a high of 93 and a low of 73. Dublin will be cloudy, as it is often at this time of the year, with a high of 75 and a low of 55. Istanbul will be clear with a high of 86 and a low of 70 while in Moscow the weather will be (4) and on the cool side with temperatures only reaching a high of 66 and going down to 48 at night, If you don’t want hot weather, stay a- way from New Delhi, where the temperature is expected to reach a high of (5) under cloudy skies and go down to a not very comfortable low of 80. And that’s it for weather around the world. 2().
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