对称电桥
参考答案：
由四个测量温度或应变力的电阻传感器组成互相对称的电桥电路，四个电阻达到某一关系时，电桥的输出为零，称电桥平衡，否则就有电压或电流输出。
An analyst does research about the inventory write-down. A reversal of an inventory write-down from a previous period is most likely reported as a(n):（）
A. unrealized gain.
B. decrease in the cost of sales.
C. increase in the inventory valuation allowance.
急性横贯性脊髓炎最常受累部位
A．尾髓
B．颈髓
C．骶髓
D．腰髓
E．胸髓
