题目：
An asset is considered impaired if:（）
A. fixed assets are lower than current assets.
B. assets are carried below their market values.
C. assets are carried at more than the sum of their undiscounted expected cash flows.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
（T）的匀强磁场中绕垂直于磁场的转轴OO’匀速转动，角速度ω=10πrad/s。若线圈经图示位置时开始计时（线圈平面平行于磁场方向），
