题目：
On January 1,2007, Sneed Corporation purchased machinery costing $ 8 million with a salvage value of $1 million. For the year ended 2007, Sneed recognized depreciation expense of $ 3.2 million from the machinery using the double-declining-balance method. Should the depreciation expense be reported as an operating component in the income statement, and what is the estimated useful life of the machinery Operating expense Useful life ()①A. No 5 years ②B. Yes 4 years ③C. Yes 5 years
A. ①
B. ②
C. ③
答案：
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参考答案：对解析：熟悉乖离率、心理线、能量潮、腾落指数、涨跌比、超买超卖等指标的基本含义与计算以及应用法则。
