France is an European country.找错

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• France is an European country.找错
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• France is an European country.找错
• It took place in France ,an eurpoean country.错在哪
• 找错：1．Those derrs are drinking water in the river．2．They come from different country．这是我在 《小学英语综合能力天天练》六年级发现DE!Help me!
• 找错：1．Those derrs are drinking water in the river．2．They come from different country．
• 某车间每天生产甲种零件120个,或乙种零件100个,或丙种零件200个,甲,乙,丙三种零件分别取3个,2个,1个才能配成一套,要在30天内生产的三种零件正好成套,问甲,乙,丙三种零件各应生产几天才能完成计划?
• 作用于同一点的两个力，大小分别为F1=5N，F2=4N，这两个力的合力F与F1的夹角为θ，则θ可能为（　　） A.30° B.45° C.60° D.75°