发电机启动前应检查所属系统工作票全部结束，并确认无人工作后进行恢复备用工作。（）
参考答案：对
《中医药条例》中明确发展中医药事业应当遵循的原则是（）
A.预防与保健相结合
B.继承与创新相结合
C.继承与发扬相结合
D.中医与西医相结合
E.理论与实践相结合
Great changes ________in my hometown and some new buildings ________.[ ]
A．have taken place；have appeared
B．have been taken place；have appeared
C．have taken place；have been appeared
D．were taken place；were appeared
