英语翻译
AMC82009年的题
1.The five pieces shown at right can be arranged to form four of the five figures below .Which figure cannot be formed？2.A sequence of numbers starts with 1,2and3.The fourth number of the sequence is the sum of the previous three numbers in the sequence:1＋2＋3＝6.In the same way,every number after the fourth is the sum of the previous three numbers.What is the eighth number in the sequence 3.The triangular plot of land ACD lies between Aspen Road.Brown Road and a railroad.Main Street runs east and west,and the railroad runs north and south.The numbers in the diagram indicate distances in miles.The width of the railroad track can be ignored.How many square in the plot of land ACD?4.The letters A,B,Cand D all represent digits.If AB and AB ,what digit does D represent?
＋CA ­­‐CA
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DA A