皮带电机振动大的原因有（）。 ["风扇损坏","地脚螺丝松","接手不正","负荷过大"]
You are creating a dial-up connection on your Windows 2000 portable computer to connect to your customer’s dial-up server. You are not sure which type of server your customer is using for dial-up connections. You want to ensure that your dial-up connection authentication is secure and that your logon information is not sent in plain text. You view the Advanced Security Settings dialog box as shown in the exhibit. Which option or options should you disable in the Advanced Security Settings dialog box?（） ["Unencrypted password （PAP）","Shiva Password Authentication Protocol （SPAP）","Challenge Handshake Authentication Protocol （CHAP）","Microsoft CHAP （MS-CHAP）","Microsoft CHAP Version 2 （MS-CHAP v2）","For Microsoft CHAP based protocols."]
大华机械厂计划生产甲产品，固定成本总额为8060元，单位变动成本率为45%，单位售价120元，应交增值税额每件10元，城建税率7%，教育费附加率3%。至少销出多少件甲产品才能保本？
Which one of the protocols below allows a router to respond to an ARP request destined to a remote host?（） [" Gateway DP"," Reverse ARP"," proxy ARP"," Inverse ARP"," indirect ARP"]
内源性节律
脾脏的主要机能。
