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【判断题】
国际协定不一定是每个国家都必须遵守，只有签约方需要遵守。()A.
正确
B.
错误
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【简答题】Case ysis: One day
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【简答题】I learned about life from an ant farm. When I was seven years old, my family created one. First, we put clean sand in a thin glass box and put the ants into it. Soon they got to work tunnels. I...
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【多选题】下列关于 GPS测量说法,正确的有( )。
A.
GPS指的是全球定位系统
B.
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C.
GPS测量不受外界环境影响
D.
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E.
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【简答题】One day Tom and I were walking down the street while we saw an old man fall off his bike. He was badly hurt. Many people crowded around us. Someone suggested carrying the old man to the roadside, so T...
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