自动扶梯在梯级改变运行方向时，能够自动停止运行的装置称为（）。
A、电气超速保护
B、非操纵逆转保护
C、主电机过载保护
参考答案：B
New ways _____ to prevent the river _____.
A．have found out, from polluting
B．have found, from being polluted
C．have been found out, from being polluted
D．have been found, from being polluted
土地费用是房地产开发项目评估中一个重要的计算参数。由土地出让金、基础设施配套费和土地开发费用组成。（）
