《不动产登记暂行条例》中的不动产主要是指（）。 ["土地","海域","房屋","林木"]
根据《URC522》的规定，以下单据不属于基本单据的是（）。 ["商业发票","海运提单","保险单","船龄证明"]
呋塞米产生利尿作用的作用部位是（） ["近曲小管","髓袢升支髓质部和皮质部","髓袢升支皮质部","髓袢降支"]
中标人确定后，招标人应（）。 ["向中标人发出通知书，可不将中标结果通知未中标人，但须退还投标保证金或保函","向中标人发出通知书，同时将中标结果通知未中标人，但无须退还投标保证金或保函","向中标人发出通知书，可不将中标结果通知未中标人，也可不必退还投标保证金或保函","向中标人发出通知书，同时将中标结果通知所有未中标人，并向未中标人退还投标保证金"]
You have Exchange Server 2003 organization. The organization contains a front-end server named FE1 and a back-end server named BE1. FE1 is accessible from the Internet by using mail.contoso.com. You plan to transition the organization to Exchange Server 2010. You will deploy a Mailbox server named MBX1 and a Client Access server named CAS1. Users will access Outlook Web App （OWA） by using the URL https：//mail.contoso.com. You need to recommend a DNS configuration for the external name of mail.contoso.com. Which server should be associated with the name mail.contoso.com？（） ["BE1","CAS1","FE1","MBX1"]
铝具有哪些优点？
