问题
选择题
我们知道，五星红旗上有五颗五角星，每一颗五角星有五个相等的锐角（如图），每个锐角等于
[ ]
A．30°
B. 36°
C．45°
D．60°
答案
答案：B
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我们知道，五星红旗上有五颗五角星，每一颗五角星有五个相等的锐角（如图），每个锐角等于
[ ]
A．30°
B. 36°
C．45°
D．60°
答案：B
Do you know an old city called "Pingyao" in Shanxi? The old city is not far from Taiyuan, the capital of Shanxi Province (省). It's a town with a long history of more than two thousand years. The old city is not very large. It is only 2.25 square kilometers in size. And there are no tall buildings here. Most of the buildings have only two floors. And most of them are made of stones(石头). There are many Chinese-style shops on each side（边）of the street. Pingyao is a square（方的）city. The city has a wall around it. It's about 6 km long and 12m high. The wall has six gates. And you mustn't miss the nice food in Pingyao. Try Pingyao beef and you are sure to fall in love with it. Pingyao is a place worth(值得) a visit. You can take buses or trains here. It's less than 2 hours' bus ride from Taiyuan. It costs you only 20 yuan. If you take a train, it will take you less time, only one and a half hours. And if you want to go to Pingyao from Beijing, the train ride takes only about 6 hours. The City of Pingyao 
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