车辆的()，指车辆本身防止或减少交通事故的能力。P217
A.被动安全性
B.主动安全性
C.动力性
D.操纵稳定性
参考答案：B
— Jim study hard these days?
—Yes, he will (将) take an exam (考试) next week.
A．Is, have to
B．Does, have to
C．Can, have to
D．Does, has to
倾角（）度以下煤层，划分为近水平煤层。
A.3
B.5
C.8
D.10
