当SRM80型清筛机在长大线路和下坡运行时，应施加（）制动。在运行中出现紧急状态，可使用紧急制动阀。
A.液压
B.空气
C.紧急
参考答案：B
Mondeo手动空调的无碳刷直流鼓风机马达是以PWM控制。
An analyst does research about the accrued revenue. Accrued revenue is properly classified on a financial statement as which of the following（）
A. Assets.
B. Liabilities.
C. Equity.
