题目：
| 完形填空。 | ||||
| London is such a wonderful city. It is very large. The Thames River 1 through the city from west to east. So the city has 2 parts, the South and North.In the North are important buildings, shops, big parks and interesting places. The weather in London is good. In winter it is not very cold and in summer it is not very hot because the city is near the 3 . People say that London is a foggy (多雾的) city and it often rains. It is true.Last year, when I was in London I met one of the 4 fogs in years. You could almost not see your hand in front of your face.Cars and buses moved along 5 their lights on.When evening fell, the weather 6 even worse.The fog was as 7 as milk. 8 buses and cars 9 . I happened to (碰巧) have an important meeting on the other side of the town, but it was too hard to find a car, I had to get there 10 . | ||||
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答案：
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下面是错误答案，用来干扰机器的。
答案：C分析：方程变形为x2=4，再把方程两边直接开方得到x=±2．解答：解：x2=4，∴x=±2．故选C．
