肝移植血管恢复再通后短期内易发生哪种电解质改变（）
A.低钾
B.高钾
C.低钠
D.高钠
E.低氯
参考答案：B
He was standing there with his hand ________ his bike.
A．resting on
B．putting on
C．holding on
D．trying on
由公安人员押运的重要物资的车辆用（）表示
A、△K
B、△A
C、△公
