在一定空间中，由同种个体组成的复合体是（） ["个体","种群","群落","生态系统"]
You have a DHCP server that runs Windows Server 2008.You need to reduce the size of the DHCP database. What should you do？（） ["From the DHCP snap-in， reconcile the database.","From the folder that contains the DHCP database， run jetpack.exe dhcp.mdb temp.mdb.","From the properties of the dhcp.mdb file， enable the File is ready for archiving attribute.","From the properties of the dhcp.mdb file， enable the Compress contents to save disk space attribute."]
重大事故隐患治理“五落实”是指什么？
亲等
明代作家（）是唐宋派古文的代表，《项脊轩志》即是他的名作。
离心式水泵轴承过热的原因是什么？应如何处理？
