An orifice-check valve placed in a hydraulic system is used to（） ["regulate the fluid flow in either direction","restrict movement of hydraulic fluid in one direction, but allow free movement in the other direction","allow free movement of hydraulic fluid in both directions","allow a restricted fluid flow in one direction only"]
BMW的驻车制动器一般采用的形式为（） ["领从蹄式","双向双领蹄式","单向自增力式","双向自增力式"]
下列质物中，可以露天无遮盖存放的有（） ["冷轧带钢","铝锭","轮胎","热轧卷板"]
以下货物可以在筒仓储存的有（） ["粮食","水泥","化肥","电子产品"]
品牌客户管理中客户经理进行签约预申请客户查询页面可选择的查询方式有哪几种？（） ["刷卡","手动","单月签约推送名单","客户手机号","以上均不是"]
配电网故障停电，调控员报送停电信息有何要求？
