问题
单项选择题
Use the results from the following survey of 500 firms to answer the question.（）
A．400 up to 500
B．400 up to 500
C．700 up to 800
答案
参考答案：C
解析：
700 - 800, lower boundary=700.
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Use the results from the following survey of 500 firms to answer the question.（）
A．400 up to 500
B．400 up to 500
C．700 up to 800
参考答案：C
解析：
700 - 800, lower boundary=700.
