局地直角坐标系（x，y，z）是建立在球面上的坐标系，其中x轴与___相切，指向___，y轴与___相切，指向___，z轴指向___。
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兰州地处北纬36°，东经 103°40’，使用的是___坐标系。
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.
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