在进行启动机全制动试验时，若扭矩和都电流小于标准值，则表明线路中（）故障。 ["短路和搭铁","断路","接触不良"]
《铁路旅客运输办理细则》超过行李规定范围应按包裹运输。
水质可溶物测定中需要称量恒定质量，两次称量相差不超过（） ["0.0001g","0.0002g","0.0003g","0.0004g"]
烧结过程中硫化物的脱硫开始在()。 ["预热带","烧结矿带","干燥带"]
What is the purpose of an explicit "deny any" statement at the end of an ACL？（） ["none，since it is implicit","to enable Cisco IOS IPS to work properly；however，it is the deny all traffic entry that is actually required","to enable Cisco IOS Firewall to work properly；however，it is the deny all traffic entry that is actually required","to allow the log option to be used to log any matches","to prevent sync flood attacks","to prevent half-opened TCP connectio"]
简述企业废旧物资回收的意义
