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Take their tour schedule Watch out for the tr Wear comfortable shoe.
Meet the speaker. Go to their rooms. Change some money.
They need more work experience The salary is usually good Their choice is limited.
A student An employer An engineer
材料中“6天”指的是时间 班车卫星往返地空一次的位移和路程都是0 班车卫星围绕地球运动一周的平均速度不为0 在研究班车卫星围绕地球运动轨迹时，班车卫星可看作质点
It’s unpredictable It’s quite stable It’s not optimistic
On September 15 On September 16 On September 23
In a park. In a hotel. In a shopping centre.
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