She_____that it was a trick to get her involved in the matter, for she knew them too well.

A．doubted

B．suspected

C．conceived

D．convinced

脱轨系数（Q/P）和轮重减载率（△P/P）是（）评定指标。

A.晃车程度

B.安全性

C.设备使用寿命

D.舒适性