兰州地处北纬36°，东经 103°40’，使用的是___坐标系。
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What does Peter do for a living?
A. He serves in the army.
B. He puts out fires.
C. He acts in films.
D. He builds houses.
Why does Peter take the Greek hero Leonidas as his hero?
A. Leonidas lost his life for his countrymen.
B. Leonidas was the king of Sparta.
C. Leonidas was the hero in the film 300.
D. Leonidas knew the danger in advance.
What does Peter worry about when doing his job?
A. His courage.
B. His family.
C. His colleagues.
D. His safety.
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