论述地下水资源评价方法及适用条件。
参考答案：
（1）解析法，适用条件，含水层均质程度较高，边界条件简单，可概化为已有计算公式要求模式。
（2）数值法，电模拟法，含水层非均质但内部结构清楚，边界条件复杂但能查清，对评价精度要求较高，面积较大。
（3）相关外推法，Q-S曲线外推法，开采试验法。不受含水层结构及复杂边界条件的限制，适于旧水源地或泉水扩大开采评价。
（4）水均衡法，单项补给量计算法。为封闭的单一隔水边界，补给项或消耗量单一，均衡要素易于确定。
（5）直接比拟法：已有水源地和勘探水源地地质条件和水资源形成条件相似。
阅读下面短文，掌握其大意．然后从各题所给的A、B、C、D四个选项中选出最佳选项。 If a snake bites you, take a photo with your mobile phone! It may save your life. This is the surprising 41 of a British cook. One day Henry Jackson was working in a restaurant kitchen. He picked up a dish from the table, and 42 a snake appeared ... and bit him on the hand. A few days earlier, the snake came to the 43 from Asia in a box of bananas. It climbed out of the box and 44 under the dish. “I went to try to pick it up and it bit me again, I threw it 45 the kitchen, and it landed in the fridge. So I closed the door,” Mr. Jackson said. Anyway, Mr. Jackson stayed 46 and he took a photo of the snake with his mobile phone. Soon his 47 began to ache and he went to hospital. Then his chest began to hurt. Doctors couldn’t say what was wrong 48 they didn’t know what kind of snake it was. Then Mr. Jackson remembered his mobile phone photo. The doctors 49 it to London Zoo. When they knew the kind of snake, they could give Mr. Jackson the right medicine, and he left hospital the next day. “So my advice is this: If a snake bites you, pick up your phone. Take 50 photo first and then show the photo to the doctors,” suggests Mr. Jackson. “Oh, and if the snake doesn’t smile for the photo, don’t worry!”
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