Complete the flow-chart below. Choose ONE WORD ONLY from the passage for each answer. Write your answers in boxes 6-9 on your an

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问题 Complete the flow-chart below.
Choose ONE WORD ONLY from the passage for each answer.
Write your answers in boxes 6-9 on your answer sheet.
How to increase the number of cockaded woodpeckers


选项

答案soil

解析 对应段落中“when there is a fire,a pulse of calcium moves down into the soil and up intothe longleaf”,原文中“moves down”对应题目中的“released”,同时原文的“up intothe longleaf”对应流程图中下一步的“Travel up to the leaves”。所以正确答案为soil。
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